Skip to main content

Top Questions

3 votes
1 answer
37 views

What is DESI's spatial resolution?

3 votes
1 answer
102 views

How is dark matter distributed within our solar system?

4 votes
3 answers
1k views

What color is the Sky on other Planets?

1 vote
1 answer
62 views

How quickly would these changes happen if the moon were to suddenly disappear?

3 votes
4 answers
2k views

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?

0 votes
1 answer
17 views

Celestron X-Cel Barlow 2x magnification or Celestron X-Cel LX eyepiece 5 mm for 250P Dobsonian Sky-Watcher Telescope

3 votes
1 answer
97 views

Easy guideline for using JPL Horizons DE431 for planets in aphelion and perihelion from 11000 BC to 16000 AD?

2 votes
1 answer
65 views

Orbit equation solver giving wrong orbits

1 vote
0 answers
43 views

How hard or soft is the Hubble's "science floor" due to atmospheric torque? Do some kinds of observations have lower floors than others?

1 vote
0 answers
29 views

What is the "handful of observations of close fast moving objects that (Hubble) can't actually track anymore" due to the new one-gyro operation?

1 vote
1 answer
49 views

Calculating field rotation between two times

2 votes
1 answer
71 views

What are the reference signal(s) for a closed-loop space-based adaptive optical system?

3 votes
2 answers
108 views

Can IR sensitive cameras read signals from Venus's surface emissions?

3 votes
2 answers
213 views

Venus Atmosphere Color

2 votes
0 answers
120 views
+400

Has "crescent-twinkling" even been demonstrated or at least calculated/predicted? Any "twinkleometer" data for Venus out there?

3 votes
0 answers
456 views
+200

How does the ESPRESSO Echelle spectrograph fold the spectrum so nicely?

1 vote
0 answers
29 views

What would happen to the sky colour if SO2 made up 95% of the atmosphere?

1 vote
2 answers
139 views

why would a black hole have a singularity point ? (a ring or disk seams more likely to me)

1 vote
0 answers
25 views

Could mars become volcanically active if it is pulled into a highly eccentric orbit

13 votes
4 answers
5k views

Is the barycenter of the solar system usually outside of the sun?

1 vote
1 answer
66 views

Does the inclination of an orbital plane change due to pull from other orbiting objects?

5 votes
1 answer
395 views

Divergence of light rays - parallel approximation

15 votes
1 answer
5k views

What caused pink flares during the eclipse

5 votes
2 answers
559 views

Difference in field of view between JWST and Euclid

1 vote
0 answers
28 views

What's the density of Proxima Centauri's photosphere?

1 vote
0 answers
13 views

cross-matched SDSS-WISE catalog

1 vote
0 answers
61 views

What does the upper and lower indices in metric tensor means?

0 votes
1 answer
123 views

Is it cheaper to mine raw materials in Antarctica or on the Moon?

13 votes
4 answers
2k views

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?

6 votes
1 answer
1k views

Is Earth's Atmospheric Thickness Related to Cosmic Ray Radiation?

0 votes
2 answers
176 views

What happens to planets as they cross the Galactic equator?

0 votes
2 answers
133 views

Do all photons coming out of the Sun go out radially?

1 vote
0 answers
88 views

Why the prefixes for words related to the planets are derived from Greek gods, even through most of the planets use the Roman names?

0 votes
1 answer
98 views

Distance from Earth to Sun averaging method in AU definition

8 votes
1 answer
193 views

Basics of Tracklet-less Heliocentric Orbit Recovery (THOR) - simple breakdown of how it works?

1 vote
1 answer
55 views

Meteor visibility from two locations

16 votes
2 answers
3k views

Why does Mars have a jagged light curve?

8 votes
3 answers
4k views

Is it theoretically possible for the Sun to go dark?

3 votes
1 answer
109 views

visible solid angle of the moon

1 vote
0 answers
52 views

calculate declination and right ascension with limited information

1 vote
0 answers
28 views

Are continuum observations in NVSS contaminated by HI spectral line?

2 votes
0 answers
20 views

How to convert .exp files from NRAO VLA Archive to .fits format

15 votes
7 answers
4k views

How to describe the Sun's location to an alien from our Galaxy?

10 votes
2 answers
2k views

How are neutrinos able to cause a supernova explosion?

2 votes
1 answer
62 views

How to calculate moon's distance and parallax in it's altitude

2 votes
3 answers
141 views

Parameters erroneously measured to be negative

-1 votes
0 answers
63 views

Is there a good Big Bang visualization (similar level of precision as the one they did for a proton)?


Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.