Astronomy Stack Exchange

5 votes

1 answer

190 views

How to plot asteroid position according to uncertainties on osculating orbital elements?

nadowe

71

modified 24 mins ago

0 votes

0 answers

38 views

Determining the heliocentric co-ordinates of the earth's centre from the earth-moon barycentric coordinates using VSOP2013 model

Coenraad van Schoor

121

modified 49 mins ago

7 votes

3 answers

930 views

Why would galaxies (and galaxy clusters) be unaffected by the expansion of space?

Angel Torregrosa

1

modified 2 hours ago

-2 votes

0 answers

53 views

How to prove ellipse and that its not spring for planets

Dr. Harish Ravi

1

modified 3 hours ago

1 vote

1 answer

22 views

How do I locate satellites in the sky using on-line predictions for my location?

uhoh

30.5k

modified 3 hours ago

14 votes

3 answers

3k views

I want to be a observational astronomer, but have no idea where to start

abuislam

1

answered 6 hours ago

0 votes

1 answer

38 views

How low would the mass of a sphere of uniform density 1 megaparsec in diameter need to be before the expansion of the universe could tear it apart?

Sten

4,767

answered 10 hours ago

0 votes

1 answer

55 views

Why Venus is the hottest planet, and not Mercury?

M. A. Golding

7,909

answered 12 hours ago

0 votes

0 answers

45 views

Question on two planets orbiting a sun

Enkt Enktson

11

modified 13 hours ago

2 votes

1 answer

58 views

Why doesn't Greenwich Sidereal Time match up with Greenwich Mean time on the equinoxes?

kyle fox

29

answered 15 hours ago

0 votes

0 answers

17 views

Is the redshift of galaxies, caused by stretching of space, added onto redshift due to speed to get total redshift? [duplicate]

DaveTheWave

1,033

asked yesterday

6 votes

2 answers

1k views

When a mass crosses a black hole event horizon does the horizon radius get larger closer to the mass or does it increase equally everywhere?

Raff89

101

answered yesterday

1 vote

1 answer

283 views

What are the estimated dates for destruction of planets by the Sun in the distant future?

ProfRob

158k

modified yesterday

0 votes

1 answer

75 views

Temperature on the outer Solar System planets

ProfRob

158k

modified yesterday

0 votes

0 answers

17 views

Comparing the mapping regions of sky surveys - southern hemisphere in particular

Jim421616

2,630

asked yesterday

8 votes

3 answers

1k views

Why does the Event Horizon Telescope (EHT) not include telescopes from Africa, Asia or Australia?

Rob

2,716

modified yesterday

3 votes

1 answer

146 views

What happens to planets after they get swallowed by red giants?

CommunityBot

1

modified yesterday

13 votes

1 answer

2k views

Can the planet Neptune be seen from Earth with binoculars?

qazwsx

121

modified 2 days ago

-3 votes

0 answers

49 views

Red dots moving fast inside a block of light stars like playing ping pong [closed]

Melissa Solt

1

asked 2 days ago

0 votes

0 answers

51 views

conversion from magnitude to flux

Alan

51

modified 2 days ago

3 votes

4 answers

1k views

Is it just coincidence that the Moon follows the ecliptic?

viiv

45

modified 2 days ago

0 votes

0 answers

46 views

Do stars passing through molecular clouds cause lightning by their friction separating charges in the cloud?

DaveTheWave

1,033

asked 2 days ago

-2 votes

0 answers

57 views

What is the formula for the yearly periodic elevation angle of a constellation like Orion? [closed]

ProfRob

158k

modified Sep 8 at 10:38

0 votes

0 answers

58 views

In-the-sky.org's simulation of the September 5, 2024 Venus-Moon conjunction seems off, but how, and why?

uhoh

30.5k

modified Sep 8 at 8:11

11 votes

1 answer

3k views

How high does the ocean tide rise every 90 minutes due to the gravitational pull of the space station?

ProfRob

158k

modified Sep 8 at 6:58

2 votes

0 answers

30 views

Relation between density and mass of a galaxy

Peter Erwin

18k

modified Sep 8 at 2:56

2 votes

1 answer

508 views

How to calculate when Mars was in retrograde around 129 BCE?

CommunityBot

1

modified Sep 7 at 20:48

-3 votes

1 answer

69 views

What's Mars mass compared to Earth since there are many different figures around?

eshaya

4,628

modified Sep 7 at 16:19

3 votes

1 answer

70 views

Skewing of data regarding velocities of stars

CommunityBot

1

modified Sep 7 at 13:06

2 votes

1 answer

45 views

What was the last simultaneous total solar eclipse and Mercury transit?

Nilay Ghosh

5,191

answered Sep 7 at 4:55

6 votes

1 answer

570 views

Velocity dispersion of stars in galaxies

Sanjay Lodh

1

modified Sep 7 at 4:28

3 votes

1 answer

393 views

What's the radius of Mars over Mount Olympus?

PM 2Ring

16k

modified Sep 7 at 3:10

6 votes

1 answer

2k views

In theory, could an object like 'Oumuamua have been captured by a three-body interaction with the sun and planets?

PM 2Ring

16k

modified Sep 7 at 2:40

5 votes

0 answers

71 views

Strange asymptotic behavior on the Kozai-Lidov cycles

viiv

45

modified Sep 6 at 20:09

3 votes

0 answers

132 views

Before they hypothesized dark matter, what did astronomers attribute the bars in barred spiral galaxies to?

benrg

4,133

modified Sep 6 at 18:30

2 votes

2 answers

96 views

How to calculate planet positions using VSOP2013

Connor Garcia♦

16.3k

modified Sep 6 at 17:56

0 votes

0 answers

64 views

Did a visiting star reshape the outer solar system?

DaveTheWave

1,033

asked Sep 6 at 15:11

4 votes

3 answers

282 views

Volcano activity on moon

Jean-Marie Prival

1,959

modified Sep 6 at 9:43

-1 votes

3 answers

183 views

Why can't astronomers find evidence for small black holes?

eshaya

4,628

modified Sep 6 at 2:35

0 votes

0 answers

55 views

Could we detect gas clouds of 5 solar masses if they were next to a 3 solar mass black hole?

DaveTheWave

1,033

modified Sep 5 at 23:55

2 votes

1 answer

152 views

Could a gas giant have terrestrial planets for trojans?

Julian Horvitz NOG 5

1

modified Sep 5 at 18:43

3 votes

2 answers

315 views

Is the Milky Way in a habitable zone?

Julian Horvitz NOG 5

1

modified Sep 5 at 18:37

2 votes

2 answers

307 views

Can a pulsar also be a magnetar?

Julian Horvitz NOG 5

1

modified Sep 5 at 18:32

11 votes

4 answers

2k views

What exactly is a "moon"?

john dumas

1

modified Sep 5 at 15:15

0 votes

0 answers

35 views

Stability of this complex gas giant moon system

Juimy94

133

modified Sep 5 at 13:59

4 votes

1 answer

419 views

How to make a 65 cm lens with a 20 cm hole in it for a Hamiltonian telescope?

CommunityBot

1

modified Sep 5 at 5:04

1 vote

0 answers

46 views

What's the maximum deflection angle from a gravitational velocity boost flyby?

Miss_Understands

2,403

asked Sep 4 at 13:42

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