User ahiijny

33

votes

3

answers

3k

views

Do moons have moons?

natural-satellites

May 7 at 4:22 ahiijny 411

16

votes

3

answers

4k

views

In which direction is the sun travelling?

the-sun

Mar 28 at 5:04 msb 215

24

votes

1

answer

4k

views

What's the reason that we have a different number of days each month?

history time terminology

Feb 29 at 0:13 user31969 1

6

votes

2

answers

237

views

Why not us interferometry to take a picture of Pluto?

planet telescope interferometry

Feb 23 at 12:33 Rob Jeffries 81k

17

votes

4

answers

4k

views

Official degrees of earth’s rotation per day

earth rotation

Nov 8 at 22:00 Larry Thomas Jones 11

9

votes

3

answers

2k

views

How is time defined in astronomy?

space-time time

Nov 6 at 8:49 John Rennie 1,414

9

votes

4

answers

2k

views

Where to obtain Tycho Brahe's data?

mars history resource

Oct 17 '19 at 19:32 Goran Gasparovic 1

44

votes

3

answers

10k

views

Why is Mars cold?

mars temperature surface

Oct 10 '19 at 10:52 pela 24.3k

20

votes

4

answers

8k

views

Would an object shot from earth fall into the sun?

the-sun orbital-mechanics

Sep 24 '19 at 13:40 TheGreatCabbage 506

11

votes

1

answer

10k

views

How does the Moon look like from different latitudes of the Earth?

Sep 9 '19 at 23:58 Faraz 1

18

votes

4

answers

2k

views

Are there any to-scale diagrams of the TRAPPIST-1 system?

trappist-1

Aug 30 '19 at 8:20 Jan van Oort 101

11

votes

2

answers

3k

views

On the consistency of different well-polished astronomy software

constellations software

Aug 5 '19 at 6:51 Mike G 11.7k

24

votes

6

answers

9k

views

If the Moon were impacted by a suitably sized meteor, how long would it take to impact the Earth?

orbit the-moon

Aug 2 '19 at 15:25 jeffB 344

9

votes

3

answers

3k

views

How well would the Moon protect the Earth from an Asteroid?

the-moon earth asteroids impact rogue-planet

Jul 30 '19 at 22:46 Muze 1

6

votes

2

answers

289

views

Is there a way to factor age into the mass-luminosity relationship for stars?

star

Jul 25 '19 at 0:00 uhoh 22.1k

19

votes

2

answers

3k

views

Why does the Earth have a z-component at the start of the J2000 epoch?

orbit nasa ephemeris

Jul 15 '19 at 15:55 amateurAstro 1,235

25

votes

4

answers

3k

views

Are there any double stars that I can actually see orbit each other?

observational-astronomy amateur-observing binary-star

Jul 14 '19 at 14:47 Community♦ 1

16

votes

1

answer

2k

views

Why can't supermassive black holes merge? (or can they?)

black-hole gravity supermassive-black-hole gravitational-waves

Jul 12 '19 at 23:56 Community♦ 1

3

votes

0

answers

66

views

Is TDB monotonic? Does it or any of its derivatives have yearly discontinuities with respect to an atomic clock?

fundamental-astronomy general-relativity time

Jul 9 '19 at 20:12 Mike G 11.7k

3

votes

1

answer

103

views

Validity of ephemeris time

time archaeoastronomy

Jul 7 '19 at 19:44 David Hammen 18k

7

votes

4

answers

6k

views

Why do things float in space, though the gravity of our star is always present? [closed]

gravity solar-system supermassive-black-hole

Jun 17 '19 at 17:31 Community♦ 1

15

votes

6

answers

2k

views

How “fast” do astronomical events occur?

observational-astronomy

Jun 16 '19 at 4:55 CJ Dennis 376

6

votes

3

answers

422

views

In astronomy Is there a name for the exact time between solar noon and sunset?

earth

Jun 7 '19 at 19:06 Sarah 11

60

votes

3

answers

17k

views

If a massive object like Jupiter flew past the Earth how close would it need to come to pull people off of the surface?

gravity

May 30 '19 at 6:11 uhoh 22.1k

2

votes

2

answers

740

views

Difference between zone time and local sidereal time?

time

May 10 '19 at 22:15 Tim Campbell 986

47

votes

3

answers

11k

views

If Earth is tilted, why is Polaris always above the same spot?

observational-astronomy earth amateur-observing fundamental-astronomy

May 1 '19 at 0:51 JohnHoltz 5,410

64

votes

2

answers

8k

views

Can gravitational waves pass through a black hole?

black-hole general-relativity gravitational-waves

Apr 24 '19 at 11:00 Nemecio Díaz 1

11

votes

3

answers

266

views

What else could the Event Horizon Telescope Observe?

radio-astronomy event-horizon-telescope

Apr 16 '19 at 22:40 Rob Jeffries 81k

1

vote

1

answer

823

views

What is that light of the middle of the milky way galaxy?

galaxy milky-way galaxy-center

Apr 16 '19 at 10:47 Community♦ 1

26

votes

2

answers

8k

views

Why didn't the Event Horizon Telescope team mention Sagittarius A*?

black-hole supermassive-black-hole sagittarius-a event-horizon-telescope

Apr 15 '19 at 20:04 Community♦ 1

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Do moons have moons?

In which direction is the sun travelling?

What's the reason that we have a different number of days each month?

Why not us interferometry to take a picture of Pluto?

Official degrees of earth’s rotation per day

How is time defined in astronomy?

Where to obtain Tycho Brahe's data?

Why is Mars cold?

Would an object shot from earth fall into the sun?

How does the Moon look like from different latitudes of the Earth?

Are there any to-scale diagrams of the TRAPPIST-1 system?

On the consistency of different well-polished astronomy software

If the Moon were impacted by a suitably sized meteor, how long would it take to impact the Earth?

How well would the Moon protect the Earth from an Asteroid?

Is there a way to factor age into the mass-luminosity relationship for stars?

Why does the Earth have a z-component at the start of the J2000 epoch?

Are there any double stars that I can actually see orbit each other?

Why can't supermassive black holes merge? (or can they?)

Is TDB monotonic? Does it or any of its derivatives have yearly discontinuities with respect to an atomic clock?

Validity of ephemeris time

Why do things float in space, though the gravity of our star is always present? [closed]

How “fast” do astronomical events occur?

In astronomy Is there a name for the exact time between solar noon and sunset?

If a massive object like Jupiter flew past the Earth how close would it need to come to pull people off of the surface?

Difference between zone time and local sidereal time?

If Earth is tilted, why is Polaris always above the same spot?

Can gravitational waves pass through a black hole?

What else could the Event Horizon Telescope Observe?

What is that light of the middle of the milky way galaxy?

Why didn't the Event Horizon Telescope team mention Sagittarius A*?