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Natsfan's user avatar
Natsfan's user avatar
Natsfan
  • Member for 7 years, 2 months
  • Last seen more than 3 years ago
  • Arlington, VA
74 votes

Why does gas form a star instead of a black hole?

26 votes

How do we have photos of galaxies so far away?

26 votes

Is there an online planetarium where the observer is on another celestial body?

14 votes
Accepted

How do we not know what's in the Solar System?

13 votes
Accepted

Are there Earth rocks on Mars?

11 votes
Accepted

Why are telescope mirrors made of glass?

8 votes
Accepted

At what depth below the Sun's surface does the density reach that of water?

8 votes

Do most astronomers think that Andromeda will collide with Milky Way?

8 votes

Where can I find the positions of the planets, stars, moons, artificial satellites, etc. and visualize them?

7 votes
Accepted

How is the size of a distant planet determined?

6 votes

Has great eyesight been necessary for astronomers?

6 votes

Software for simulating a night sky

6 votes
Accepted

Why are stars still distant from one another?

5 votes

If I want to learn about astrophysics, should I study up on mathematics?

5 votes
Accepted

What contributes the most to the seasonal temperature variation?

4 votes

Why are nearby stars like Proxima Centauri and Barnard's star not visible to the naked eye?

4 votes

Star map, where?

4 votes

Is the sun any brighter during a solar eclipse

4 votes

Does the Lagrange L1 point have a 'size'?

4 votes

Largest body in the solar system that a baseball thrown by a professional pitcher could escape

4 votes

Is there a Vela Nebula?

3 votes
Accepted

How to calculate shape of orbit when projected onto the plane of the ecliptic

3 votes
Accepted

Which celestial body's length of day is closest to that of Earth?

3 votes
Accepted

Does nucleosynthesis happen near a black hole or during its formation?

3 votes

Tycho Brahe's model

3 votes
Accepted

is there any mathematical formula, paper or anything that shows the probability of a meteor hitting a particular spot of moon's surface?

3 votes

Stuck with SDSS data

3 votes

Is there any legitimacy to this report of planet nine being discovered by an amateur?

3 votes

Can electromagnetic waves be affected by gravity?

3 votes

What are the criteria for the classification of galaxies?