Magazine

Galaxies

If galaxies are expanding away from one another, why are Local Group galaxies like the Milky Way and Andromeda moving toward each other?

Observing

Phil Harrington’s binocular universe: Meet the colorful Gemini twins

Stars

Why are neutron stars constrained to a diameter of 10 to 12 miles?

Science

Galaxy quest

Observing

Try the Messier Marathon

Galaxies

Simulated galactic crack ups

Galaxies

Galaxies collide in Andromeda

Science

A peculiar jewel of the north

Telescopes and Equipment

Make the BT70 binoculars “go-to”

Science

Angular distance and star color

Science

What will happen when the 100-plus-solar-mass star Eta Carinae dies?

Observing

Glenn Chaple’s observing basics: Eyepiece ABCs