Ask Astro

Exoplanets, Milky Way, Stars

Ask Astro: Is Sirius part of the Milky Way? Does it have any planets?

Solar System

Ask Astro: What is the Caloris Basin on Mercury — and how did it form?

Robotic Spaceflight

Ask Astro: What fuel do spacecraft use to explore the distant solar system?

Science

Ask Astro: The universe is full of dust — what’s it made of?

Exotic Objects

Ask Astro: If time stops for an object falling into a black hole, how can LIGO see black holes colliding?

Solar System

Ask Astro: Are meteorites radioactive?

Cosmology, Galaxies

Ask Astro: Does dark energy create the voids between galaxy clusters?

Exotic Objects, Galaxies

Ask Astro: Can a black hole form without a parent star?

Solar System

Ask Astro: Does Mars have its own North Star?

Cosmology

Ask Astro: How much of the universe can we observe?

Robotic Spaceflight, Solar System

Ask Astro: Will dust storms foil our plans to retrieve Perseverance’s samples?

Solar System

Ask Astro: Why do Saturn’s rings look solid when they’re not?