Magazine

Cosmology

What is polarization? What does it have to do with the cosmic microwave background?

Astrophotography

Creating unresolved stars

Cosmology

Is the universe depressed?

Exotic Objects, Stars

Web Extra: Listen to two supernova songs

Exotic Objects, Stars

A recent study found that a type Ia supernova’s original star could be anywhere from 0.9 to 1.4 times our Sun’s mass. Astronomers use these blasts’ brightnesses to estimate distances, so are those measurements now incorrect?

Science

Nuclear fusion of hydrogen into helium powers stars, but fusion requires a lot of energy. Where does this energy come from?

Cosmology

Web Extra: Ripples in space

Astronomy for beginners

Society support

Exoplanets, Planets, Solar System

What would a uranian day and year be like? What path across the sky would the Sun follow?

Exoplanets, Planets, Solar System, The Moon

Mercury in the morning

Galaxies

A kingdom of dwarfs

Cosmology

What is Dark Matter?