Ask Astro

Solar System, Stars

Why will our Sun expel its outer layers as it dies? 

Cosmology, Galaxies, Stars

How did Edwin Hubble prove Andromeda was a galaxy?

Solar System

When the Sun becomes a red giant, will the outer planets and moons become more temperate?

Robotic Spaceflight

Can either Voyager image our solar system from their current location?

Stars

When was the last supernova seen in the Milky Way?

Observing

Is dew point or relative humidity more important for good astronomical seeing?

Exotic Objects

Do black holes exist forever?

Stars

Before Einstein, what did astronomers think powered the Sun?

Solar System

Was there ever a planet between Mars and Jupiter? 

Stars

Will Sirius B explode as a type Ia supernova?

Telescopes and Equipment

What is the difference between a 2″ eyepiece and a 1¼” eyepiece?

Science, Solar System

How much less would you weigh on the Moon than on Earth?