Questions tagged [astronomy]

Questions more about celestial bodies themselves than exploration of them.

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20
votes
2answers
3k views

Are images of exoplanets' surfaces technically possible?

While already even taking an image of an extra solar planet sounds like science fiction to me, is it technically possible by what we know now to take also more detailed images of extraterrestrial ...
17
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5answers
4k views

Would a lunar telescope provide a significant improvement over terrestrial based equipment?

As I understand it, the moon makes for an ideal location for a telescope because it offers environmental factors that are unlike anything achievable on earth: A lack of atmosphere, light pollution, ...
1
vote
1answer
123 views

When will the telescope that last saw Starman/Roadster be able to see it again?

According to this answer to When was the last time that Starman/Roadster was seen? it was last seen by Earthlings at least at 2018-03-19 03:22:33 UTC by a 1 meter ...
12
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2answers
547 views

Interstellar eavesdropping

For about a century, humanity has broadcasted noise to space in the form of TV broadcasts, radio, etc... The nearest star is 4.242 light-years away, so for about 90 years, aliens -- if they exist in ...
5
votes
3answers
811 views

Does the Earth have any Trojan asteroids?

Are there any known Trojan objects residing in the Sun-Earth L4 (SEL4) and L5 (SEL5) Lagrange points, also named "Greek" and "Trojan" groups, respectively?
7
votes
1answer
244 views

What are the effects of orbital reflectors and advertising on scientific observation?

There's a couple of startups and initiatives which are proposing "space billboards" which have been getting a lot of bad press recently. Most of the proposals involve a bunch of cubesats with large ...
7
votes
1answer
3k views

Is there a telescope on board the ISS?

I am wondering if there is a telescope in or outside the ISS that has been used for astronomical imaging? I have seen here that there is already a Celestron telescope on board but it is only used for ...
3
votes
1answer
150 views

Did Skylab astronauts really "go outside" to look at comet Kohoutek? If so, why?

Today in The BBC's Skylab: The myth of the mutiny in space it says: The Skylab space station was a research platform in orbit where astronauts helped scientists to study the human body's response to ...
3
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0answers
36 views

At what wavelengths and for what particle types have astronomical objects been imaged or at least directionally resolved from the ISS?

The ISS has an X-ray telescope called NICER and this answer in Astronomy SE (and links therein) explain that it was able to show that there are hot spots clustered near one pole of the pulsar PSR ...
25
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2answers
1k views

Is there a Martian "North Star", usable as Earth's North Star?

Mars has a different axial tilt than Earth. It stands to reason that the constellations will remain identical from Mars, but their locations will be somewhat different. On Earth, the North Star is ...
8
votes
2answers
482 views

NASA just announced 715 new exoplanets were discovered, what do we know about them?

I have been trying to find information on how far away these new exoplanets are from Sol. Does anybody have a map or a table that shows their distance to us in light years. There only seem to be 100 ...
6
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1answer
1k views

Are there any natural circular orbits?

I just saw How does orbital eccentricity affect positions of Lagrange points $L_4$ and $L_5$? and it questions the difference between circular and elliptical orbits. We know the Moon does not have a ...
6
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4answers
309 views

Are there any other Earth-like planets in the universe?

There are many galaxies in the universe. Is there any other Earth-like planet out there?
2
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1answer
106 views

Kinematics help

If a constant acceleration starship started at rest, then accelerated at 25G (245m/s^2) how long would it take to fly an AU (149 597 871 kilometers)? I am a writer, so I have no experience with ...
2
votes
1answer
153 views

Is there any Scientific Benefit to the Lower Albedo levels on the Darkside of the Moon?

I was reading the answers to this question: What did the sky actually look like from the Moon? And it got me thinking... What, if any, astronomy tasks could be performed better on the lunar far side ...
2
votes
1answer
201 views

How to become an astronaut?

I am a pure/applied mathematics student at Tehran University. About 2 or 3 years later I will get my bachelor's degree and start studying master's in applied math or theoretical physics. And maybe I ...