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Astronomy

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Answer score of 10 or more. This badge can be awarded multiple times.
Awarded 2710 times.
What does HJD-2450000 mean?
Awarded 2 days ago
Always orient a sundial towards polar north?
Awarded 2 days ago
In the onion-like elemental layers of a large mature star the neon is closer to the surface than oxygen, even though it is more massive... Why?
Awarded Jul 16 at 9:33
In the onion-like elemental layers of a large mature star the neon is closer to the surface than oxygen, even though it is more massive... Why?
Awarded Jul 15 at 13:11
Can a star be made of sun spots?
Awarded Jul 15 at 6:07
Can a star be made of sun spots?
Awarded Jul 11 at 16:03
Are any Population III stars red dwarfs?
Awarded Jul 10 at 8:06
Are the North Star and the moon ever visible in the night sky at the same time?
Awarded Jul 9 at 18:10
If the lunar maria are impact craters, why don't they have central peaks?
Awarded Jul 9 at 15:10
Are the North Star and the moon ever visible in the night sky at the same time?
Awarded Jul 9 at 1:51
How close would a quasar have to be to be seen with the naked eye?
Awarded Jul 8 at 0:10
How did the year 1904 not have 367 days?
Awarded Jul 2 at 15:43
Size of the Unobservable Universe
Awarded Jul 2 at 2:52
Why is Uranus colder than Neptune?
Awarded Jul 1 at 7:40
Why does c show up in Schwarzschild's equation for the horizon radius?
Awarded Jun 26 at 10:56
Are there really half-a billion visible supernovae exploding all the time?
Awarded Jun 24 at 19:55
Finding a paper that has only abstract on ADS
Awarded Jun 23 at 22:45
Why don't they put more spare gyroscopes in expensive space telescopes?
Awarded Jun 21 at 5:08
Why don't they put more spare gyroscopes in expensive space telescopes?
Awarded Jun 20 at 16:22
Why don't they put more spare gyroscopes in expensive space telescopes?
Awarded Jun 19 at 12:51
Why don't we see more supernovae in our galaxy?
Awarded Jun 19 at 2:15
Would a series of gravitational waves from a supernova affect time on a 200 year old clock just as water waves affected clocks on ships in rough seas?
Awarded Jun 15 at 20:19
Difference in field of view between JWST and Euclid
Awarded Jun 13 at 19:25
When exactly was the last time that Earth's aphelion coincided (within 24 hours) with the northern winter (December) solstice?
Awarded Jun 13 at 6:07
Is Earth's Atmospheric Thickness Related to Cosmic Ray Radiation?
Awarded Jun 12 at 20:56
Is it theoretically possible for the Sun to go dark?
Awarded Jun 11 at 16:56
Why does Mars have a jagged light curve?
Awarded Jun 10 at 20:17
Why does Mars have a jagged light curve?
Awarded Jun 10 at 10:06
Is it theoretically possible for the Sun to go dark?
Awarded Jun 9 at 9:50
Why do stars usually stop fusion at iron, even though nickel-62 has the highest binding energy per nucleon?
Awarded Jun 8 at 15:07
How are neutrinos able to cause a supernova explosion?
Awarded Jun 7 at 10:20
How are neutrinos able to cause a supernova explosion?
Awarded Jun 7 at 6:35
Is this an image of an astronomical observatory? If not, what's behind these domes?
Awarded Jun 5 at 13:10
Why does this Lowell Observatory telescope have so many knobs? What do they all do?
Awarded Jun 5 at 12:36
Decreasing rate of Earth's rotation: where does the power go?
Awarded Jun 5 at 12:36
Why when i divide the distance of sun to earth by golden ratio, the result starts with the last 5 digits of speed of light?
Awarded Jun 4 at 21:55
Vera C. Rubin's LSST's ginormous camera's shutter; why does it open/close 1000 times a night & is this typical for large-format survey telescopes?
Awarded Jun 3 at 20:02
Vera C. Rubin's LSST's ginormous camera's shutter; why does it open/close 1000 times a night & is this typical for large-format survey telescopes?
Awarded Jun 3 at 18:25
What can I see with 10x50 binoculars in bortle class 4?
Awarded Jun 3 at 6:06
How many individual extrasolar "shiny" objects has humanity identified?
Awarded Jun 1 at 13:57
Visibility of Planetary alignment of 6 planets on 3 June 2024 from Prague
Awarded May 29 at 9:26
Can a crater form inside another crater
Awarded May 28 at 20:07
Visibility of Planetary alignment of 6 planets on 3 June 2024 from Prague
Awarded May 28 at 18:42
Can a crater form inside another crater
Awarded May 27 at 6:23
Can a crater form inside another crater
Awarded May 27 at 1:17
Why are the magnetic poles of a pulsar so far off the rotational axis, yet stable?
Awarded May 26 at 23:25
Why no Big Bang are happening now?
Awarded May 26 at 18:56
How close will Pluto come to Earth this year (2024)?
Awarded May 24 at 19:51
How close will Pluto come to Earth this year (2024)?
Awarded May 22 at 22:56
What does an inclination of 0 degrees mean?
Awarded May 21 at 9:47
Stellar Mass Black Holes and the companion star dynamics
Awarded May 20 at 23:21
Why are orbits elliptical instead of circular?
Awarded May 20 at 16:16
Are spectral subtypes a logarithmic scale, or a linear one?
Awarded May 20 at 14:36
Why do we want to normalize the solar abundance of elements to Si?
Awarded May 19 at 0:02
What is the difference between a solar eclipse seen from Earth, the Moon, and from 1 one of Jupiter's Galilean moons (ex. Io)?
Awarded May 18 at 10:37
Why do larger mass stars form quicker?
Awarded May 15 at 20:32
Evolution of black holes. Could they lose mass faster than the Hawking radiation?
Awarded May 14 at 8:03
Why does metallicity increase the opacity inside stars?
Awarded May 9 at 18:56
Can individual rings of Saturn be considered satellites?
Awarded May 9 at 13:40
How do K, F, A and B stars die?
Awarded May 7 at 12:58
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