Existence of a celestial body big enough for early civilization to be thought of as a second moon
$begingroup$
Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time?
- With it being big enough for early civilization to consider it a second moon but much smaller than the actual one.
- And occurring each year for one thousand years.
I thought two moons questions are similar enough, but I haven't found a proper answer for myself.
Thank you!
space earth-like
edited 2 days ago
Willk
113k27211476
asked 2 days ago
shootshishootshi
535
New contributor
shootshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
|
show 1 more comment
$begingroup$
Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time?
- With it being big enough for early civilization to consider it a second moon but much smaller than the actual one.
- And occurring each year for one thousand years.
I thought two moons questions are similar enough, but I haven't found a proper answer for myself.
Thank you!
space earth-like
edited 2 days ago
Willk
113k27211476
asked 2 days ago
shootshishootshi
535
New contributor
shootshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
2 days ago
1
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
2 days ago
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
2 days ago
3
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
2 days ago
2
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
2 days ago
|
show 1 more comment
$begingroup$
Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time?
- With it being big enough for early civilization to consider it a second moon but much smaller than the actual one.
- And occurring each year for one thousand years.
I thought two moons questions are similar enough, but I haven't found a proper answer for myself.
Thank you!
space earth-like
edited 2 days ago
Willk
113k27211476
asked 2 days ago
shootshishootshi
535
New contributor
shootshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time?
- With it being big enough for early civilization to consider it a second moon but much smaller than the actual one.
- And occurring each year for one thousand years.
I thought two moons questions are similar enough, but I haven't found a proper answer for myself.
Thank you!
space earth-like
space earth-like
edited 2 days ago
Willk
113k27211476
asked 2 days ago
shootshishootshi
535
New contributor
shootshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
Willk
113k27211476
asked 2 days ago
shootshishootshi
535
New contributor
shootshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
Willk
113k27211476
edited 2 days ago
Willk
113k27211476
edited 2 days ago
Willk
113k27211476
113k27211476
asked 2 days ago
shootshishootshi
535
New contributor
shootshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 days ago
shootshishootshi
535
asked 2 days ago
shootshishootshi
535
535
New contributor
shootshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
shootshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
shootshi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
2 days ago
1
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
2 days ago
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
2 days ago
3
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
2 days ago
2
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
2 days ago
|
show 1 more comment
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
2 days ago
1
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
2 days ago
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
2 days ago
3
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
2 days ago
2
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
2 days ago
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
2 days ago
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
2 days ago
1
1
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
2 days ago
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
2 days ago
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
2 days ago
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
2 days ago
3
3
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
2 days ago
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
2 days ago
2
2
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
2 days ago
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
2 days ago
|
show 1 more comment
2 Answers
2
active
oldest
votes
$begingroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered 2 days ago
LSerniLSerni
28.7k25192
$endgroup$
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
2 days ago
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
yesterday
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
22 hours ago
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
13 hours ago
add a comment |
$begingroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered 2 days ago
WillkWillk
113k27211476
$endgroup$
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
$endgroup$
– LSerni
yesterday
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered 2 days ago
LSerniLSerni
28.7k25192
$endgroup$
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
2 days ago
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
yesterday
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
22 hours ago
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
13 hours ago
add a comment |
$begingroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered 2 days ago
LSerniLSerni
28.7k25192
$endgroup$
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
2 days ago
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
yesterday
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
22 hours ago
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
13 hours ago
add a comment |
$begingroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered 2 days ago
LSerniLSerni
28.7k25192
$endgroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered 2 days ago
LSerniLSerni
28.7k25192
edited yesterday
answered 2 days ago
LSerniLSerni
28.7k25192
answered 2 days ago
LSerniLSerni
28.7k25192
answered 2 days ago
LSerniLSerni
28.7k25192
28.7k25192
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
2 days ago
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
yesterday
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
22 hours ago
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
13 hours ago
add a comment |
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
2 days ago
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
yesterday
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
22 hours ago
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
13 hours ago
5
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
2 days ago
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
2 days ago
1
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
yesterday
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
yesterday
1
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
22 hours ago
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
22 hours ago
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
13 hours ago
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
13 hours ago
add a comment |
$begingroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered 2 days ago
WillkWillk
113k27211476
$endgroup$
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
$endgroup$
– LSerni
yesterday
add a comment |
$begingroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered 2 days ago
WillkWillk
113k27211476
$endgroup$
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
$endgroup$
– LSerni
yesterday
add a comment |
$begingroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered 2 days ago
WillkWillk
113k27211476
$endgroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered 2 days ago
WillkWillk
113k27211476
answered 2 days ago
WillkWillk
113k27211476
answered 2 days ago
WillkWillk
113k27211476
answered 2 days ago
WillkWillk
113k27211476
113k27211476
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
$endgroup$
– LSerni
yesterday
add a comment |
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
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– LSerni
yesterday
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This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
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– LSerni
yesterday
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This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
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– LSerni
yesterday
add a comment |
shootshi is a new contributor. Be nice, and check out our Code of Conduct.
shootshi is a new contributor. Be nice, and check out our Code of Conduct.
shootshi is a new contributor. Be nice, and check out our Code of Conduct.
shootshi is a new contributor. Be nice, and check out our Code of Conduct.
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Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
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– StephenG
2 days ago
1
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Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
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– JBH
2 days ago
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@StephenG true, but not all of them were considered moons.
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– shootshi
2 days ago
3
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Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
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– JBH
2 days ago
2
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Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
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– Agrajag
2 days ago