Astronomy

Popular Question

 Popular Question
Question with 1,000 views. This badge can be awarded multiple times.
Awarded 2332 times.
What does "to within less than about thirty Schwarzschild radii" mean?
Awarded 11 hours ago
Are there any known objects in a "dual" tidally locked orbit?
Awarded 13 hours ago
What's the differences between one-dimensional spectrum and two-dimensional spectrum?
Awarded yesterday
JPL Horizons - "highly accurate measurements of planetary positions" - how do they do it?
Awarded yesterday
How to calculate the pixel size and beam size of an image?
Awarded Jun 24 at 17:16
Do other planets affect the Earth?
Awarded Jun 23 at 7:28
Martian Constellations
Awarded Jun 22 at 18:04
What elements and compounds would be present in a red gas giant?
Awarded Jun 22 at 5:11
How loud would a supernova, kilonova, and hypernova be? [closed]
Awarded Jun 21 at 16:08
Trying to identify something I saw in the sky
Awarded Jun 21 at 13:05
Practicing image processing and analysis
Awarded Jun 20 at 14:48
Why do stars twinkle but planets don't [duplicate]
Awarded Jun 17 at 6:50
Moon inclination
Awarded Jun 17 at 4:51
How can Halley's Comet be predictable?
Awarded Jun 17 at 2:50
How sure are we about the speed of light in vacuum in deep/far space?
Awarded Jun 16 at 11:28
How many times has the Milky Way rotated?
Awarded Jun 15 at 7:34
How to plot celestial equator in galactic coordinates? Why does my plot appear "backwards"? [duplicate]
Awarded Jun 14 at 18:27
How can I calculate the uncertainties in magnitude like the CDS does?
Awarded Jun 14 at 13:17
Assume that a star has a uniform mass density. Then how does the temperature scale as a function of the distance to the center?
Awarded Jun 14 at 9:46
How was Cassini able to measure and use the Earth-Mars distance to get the Earth-Sun distance?
Awarded Jun 13 at 12:33
Why is the summer solstice night shorter than the winter solstice day?
Awarded Jun 13 at 12:26
Does mass create space?
Awarded Jun 13 at 7:16
Planets looks like normal stars when I see them using telescope
Awarded Jun 12 at 19:50
How long was an early Earth year? [duplicate]
Awarded Jun 12 at 12:16
Find distance from star to star?
Awarded Jun 10 at 16:57
Why are asteroids so much richer in precious metals than Earth's crust?
Awarded Jun 10 at 12:40
Has the small meteorite that hit Webb done a lot of damage?
Awarded Jun 10 at 11:27
Finding luminosity of a star with magnitude
Awarded Jun 9 at 9:47
How to figure out what something in the sky is?
Awarded Jun 9 at 9:19
What are those stars that cross the galactic center?
Awarded Jun 8 at 18:16
Finding Scorpio in the Milky Way panorama
Awarded Jun 7 at 17:42
Time measurement outside solar system?
Awarded Jun 7 at 7:07
Location on (or in) the celestial sphere
Awarded Jun 7 at 4:16
Would blocking sunlight on Venus help make it habitable? [closed]
Awarded Jun 6 at 20:11
Calculating the black hole evaporation time
Awarded Jun 5 at 6:48
If we count Avogadro's Number of stars that are closest to Earth, how big that space would be?
Awarded Jun 3 at 0:27
Why don't we have in-between planets?
Awarded Jun 2 at 19:36
What soviet telescope is this?
Awarded Jun 2 at 16:30
What is the difference between New Moon day and Lunar Eclipse?
Awarded Jun 2 at 15:17
How to calculate true equinox position?
Awarded Jun 2 at 13:52
How it is not possible to say if Titius–Bode law is a "coincidence" or not?
Awarded Jun 1 at 15:22
At what point in history was the idea of planets being spit out by the sun abandoned?
Awarded Jun 1 at 12:52
Problem with Dobsonian reflector telescope
Awarded Jun 1 at 3:05
What happens outside of the universe? [duplicate]
Awarded May 30 at 22:06
How can a brown dwarf be more massive than a star?
Awarded May 30 at 12:37
Is the center of our galaxy, the Sagittarius A* black hole a former star?
Awarded May 26 at 4:05
Why haven’t we observed supernova events of the hypothetical population III stars?
Awarded May 25 at 10:09
What are the most valuable meteorites and asteroids in terms of precious metals?
Awarded May 23 at 16:42
"Chain reaction" supernovae?
Awarded May 23 at 8:56
How to estimate uncertainty of measurements of equivalent widths?
Awarded May 23 at 8:20
Is it possible to disprove geocentrism without telescopes?
Awarded May 21 at 17:55
Can someone explain to me the TEME reference frame in defining orbital coordinates?
Awarded May 21 at 14:40
Why do certain massive stars leave no remnants?
Awarded May 19 at 21:58
Is the scaling in this composite photo of the moon and the Andromeda galaxy reasonably correct?
Awarded May 19 at 19:07
What is the density profile within the Sun's photosphere? Which one of these is wrong?
Awarded May 19 at 8:36
Formula to calculate B-V index? [duplicate]
Awarded May 16 at 14:36
Why did the moon have a distinct reddish edge tonight?
Awarded May 16 at 3:27
What's the difference between an exoplanetary transit and eclipse? [duplicate]
Awarded May 15 at 18:56
Right Ascension for epoch 2000 - physical location?
Awarded May 15 at 17:41
What is the nature of "rock vapor" in this description of the formation of the Moon?
Awarded May 14 at 23:40
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