Ask Astro

Cosmology, Science

Why are gravity and quantum mechanics incompatible with each other? Why can’t they be combined into a single formula or concept?

Solar System, The Sun

What will happen to the outer solar system when the Sun dies?

Exotic Objects

Are black holes always spheres?

Stars

What’s the difference between a brown dwarf and a planet?

Astronomy for beginners, Observing Basics

Why do the constellations and the Moon appear upside down from the Southern Hemisphere?

Exoplanets, Planets

Why do aurorae appear strongest within rings centered on Earth’s poles instead of filled-in circles?

Milky Way

How old is the Milky Way, and has it merged with other galaxies along the way?

Exoplanets, Planets

Would it be possible to find a moon around an extrasolar planet? If so, how?

Science

How deep are the craters on the Moon?

Science

Ask Astro: What does the prefix NGC mean?

Science

Ask Astro: What are the redshifts of the farthest known objects?

Exotic Objects, Solar System

Ask Astro: What are the chances of dark matter or a black hole ripping apart Earth?