Ask Astro

Stars

If protostars aren’t yet generating light through fusion, how can JWST see them?

Cosmology

What is the cosmic web made of?

Alien Life, Solar System

Why was Cassini crashed into Saturn to prevent contamination if Huygens intentionally landed on Titan?

Exotic Objects

Do black holes have bottoms?

Solar System

What would happen to Earth if a large asteroid hit the Moon?

Exotic Objects

What are the blobs in the EHT image of the Milky Way’s supermassive black hole?

Observing

How do professional observatories deal with dew on mirrors and lenses?

Solar System, Stars

Why is Jupiter not a star or a brown dwarf?

Solar System

Ask Astro: Can Phobos and Deimos be seen from the surface of Mars?

Exotic Objects

Ask Astro: How do some astrophysical objects spin hundreds of times per second?

Astrophotography, Observing

Ask Astro: What causes the pattern of diffraction spikes in astronomical images?

Solar System

Ask Astro: How do we distinguish the north and south poles of planets other than Earth?