Ask Astro

Solar System, The Moon

Ask Astro: What happened after the giant impact that created the Moon?

Exoplanets

Ask Astro: Have there been any exoplanets discovered in globular star clusters?

Galaxies

Ask Astro: Why do galaxies have spiral arms? Do smaller objects have them too?

Exotic Objects, Galaxies

Ask Astro: What happens when a galaxy ejects its supermassive black hole?

Exoplanets, Planets, Robotic Spaceflight, Solar System

Ask Astro: Can New Horizons help us find Planet Nine?

Cosmology, Exotic Objects

Ask Astro: What would happen if NGC 6240’s three supermassive black holes merged?

Exoplanets, Planets, Solar System

Ask Astro: How hot would Venus be at different distances from the Sun?

Exotic Objects

Ask Astro: How do stars make elements heavier than iron?

The Moon

Ask Astro: Why does the Moon disappear during New Moon?

Cosmology, Galaxies

Ask Astro: If dark matter is invisible, then how do we detect it?

Galaxies, Milky Way

Ask Astro: How many satellite galaxies does the Milky Way have?

Exoplanets, Planets

Ask Astro: Can planets be pear-shaped, or are they all spheres?