How Far Away Are the Stars Really
Starlight you see tonight may have left before you were born. Learn light-years, parallax, and how astronomers measure the staggering distances to the stars.
Topic
Constellations, galaxies, nebulae, and the science of the wider universe.
Starlight you see tonight may have left before you were born. Learn light-years, parallax, and how astronomers measure the staggering distances to the stars.
Our galaxy arcs overhead as a river of light from dark sites. Learn when and where the Milky Way's core rises and how to take in its full sweep.
The Pleiades sparkle while globular clusters blaze with a million suns. Learn how the two cluster types differ and where to find the finest examples.
From the Orion Nebula to dying star shells, nebulae are the sky's most beautiful targets. Learn the types, what they are, and how to observe them.
Andromeda is 2.5 million light-years away and visible to the naked eye. Learn what galaxies are, which ones you can spot, and how to find them tonight.
Orion the hunter, Cassiopeia's vanity, Scorpius and its sting. The sky is a storybook. Discover the legends that named the patterns you trace each night.