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 Popular Question
Question with 1,000 views. This badge can be awarded multiple times.
Awarded 1295 times.
How often do supernovae occur?
Awarded 2 days ago
Is this photocomposition of Andromeda's galaxy and the Moon accurate?
Awarded Jan 21 at 22:35
What is visible light colour output of different stars?
Awarded Jan 21 at 10:35
Why does the sensitivity to GWs drops off inversely proportional to the distance?
Awarded Jan 20 at 16:05
What created the big bang's singularity?
Awarded Jan 19 at 22:30
How far away are the events that caused the gravitational waves that have been detected?
Awarded Jan 15 at 14:20
Why is Ganymede's aurora only visible in ultraviolet while Earth's is bright green and red?
Awarded Jan 15 at 13:55
Why are perihelion and the shortest day in the northern hemisphere different?
Awarded Jan 13 at 11:20
How to find RA 0
Awarded Jan 11 at 18:30
Is there any difference between rotation axis 90 degrees and 270 degrees? [closed]
Awarded Jan 10 at 17:20
Can virtual particles be the source of dark matter and dark energy? [closed]
Awarded Jan 9 at 1:55
How close would the sun have to get to Earth for there to be severe consequences?
Awarded Jan 8 at 5:15
Why do photos of Earth always have a black background?
Awarded Jan 6 at 21:15
Calculate time when star is above altitude 30°
Awarded Jan 6 at 1:35
Are stars expected to become dimmer before a supernova?
Awarded Jan 3 at 11:25
What is the actual black hole merger speed?
Awarded Jan 2 at 18:40
How much of carbon, sodium, silicon, and magnesium does the Sun have?
Awarded Jan 1 at 17:55
Approximate distance from Earth to Mars at a given moment with reasonable (+/-100km) accuracy?
Awarded Jan 1 at 12:25
Why do our clocks not go out of sync with the day over a year?
Awarded Dec 31 '19 at 3:30
Has great eyesight been necessary for astronomers?
Awarded Dec 30 '19 at 16:55
I see a non flickering star. How is this possible?
Awarded Dec 28 '19 at 1:30
Can you simulate artificial gravity by using an electromagnetic field?
Awarded Dec 27 '19 at 15:30
What observation can be expected on LIGO if any when Betelgeuse goes supernova?
Awarded Dec 27 '19 at 3:40
Is it possible to extend the life of a star?
Awarded Dec 26 '19 at 4:35
Approximate conversion of redshift 'z' to a time and/or distance, when reading papers?
Awarded Dec 24 '19 at 21:45
What's the rationale behind the false colours in solar observation photographs?
Awarded Dec 23 '19 at 20:15
What are the last images from the Galileo orbiter before impacting Jupiter?
Awarded Dec 23 '19 at 8:40
How many actual stars are Polaris?
Awarded Dec 23 '19 at 3:40
Can we actually predict an asteroid impact? [duplicate]
Awarded Dec 22 '19 at 18:50
How do we know the big bang didn't happen in an existing universe?
Awarded Dec 20 '19 at 7:15
How to project galaxy data in x y z coordinates?
Awarded Dec 19 '19 at 19:10
Aren't there more naked-eye-visible stars in the Milky Way plane?
Awarded Dec 18 '19 at 12:15
Are these real paths of planets as traced from Earth?
Awarded Dec 18 '19 at 3:50
Are the stars distributed in uniform distribution, on the celestial dome, with respect to brightness?
Awarded Dec 17 '19 at 6:20
Why is the main sequence often called 'zero age' main sequence?
Awarded Dec 16 '19 at 23:00
Could the barycenter orbit of our sun be greatly underestimated?
Awarded Dec 16 '19 at 1:00
How much illumination do the background stars provide?
Awarded Dec 15 '19 at 18:15
How to photograph Saturn
Awarded Dec 15 '19 at 14:30
Moon's unusual gravity
Awarded Dec 12 '19 at 19:55
Milky Way mass fraction breakdown review
Awarded Dec 12 '19 at 17:00
Could dark energy be negative gravity?
Awarded Dec 11 '19 at 20:15
What are optical counterparts?
Awarded Dec 9 '19 at 21:30
Calculation of hour angle
Awarded Dec 9 '19 at 14:40
Is “Main Sequence” a temporal sequence?
Awarded Dec 8 '19 at 2:10
Can we calculate the average temperature of the heliosphere?
Awarded Dec 8 '19 at 0:00
Is Jupiter still an anomaly?
Awarded Dec 5 '19 at 21:35
How far apart are stars in a binary system?
Awarded Dec 5 '19 at 10:20
Can we violate law of physics in any other planet? [closed]
Awarded Dec 4 '19 at 9:55
Why can't neutron stars ignite and explode?
Awarded Dec 4 '19 at 9:25
Space time and aging
Awarded Dec 3 '19 at 22:25
Why do dark objects look white from a distance? (Moon, Ceres, but not Earth!)
Awarded Dec 3 '19 at 14:25
What is the proper interpretation of a negative parallax?
Awarded Dec 3 '19 at 13:20
Why does the 70-solar-mass black hole in the LB-1 system challenge current astrophysics?
Awarded Dec 3 '19 at 7:30
The size of the radius of the event horizon of a black hole created by the merger of a black hole binary system
Awarded Dec 1 '19 at 16:50
Why can’t I see any detail on planets?
Awarded Dec 1 '19 at 3:20
How do I calculate the inclination of an object with an amateur telescope?
Awarded Nov 30 '19 at 2:25
Why do we continue to find a discrepancy in the Hubble Constant?
Awarded Nov 26 '19 at 21:15
Why not send a Gaia-like mission to Mars?
Awarded Nov 26 '19 at 12:45
Why is Gaia operating around Earth orbit? Why not send it to Neptune's orbit?
Awarded Nov 25 '19 at 13:35
How often are there lunar eclipses on Jupiter
Awarded Nov 25 '19 at 2:15
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