Skip to content Most of what we know comes from studying radiation beyond just visible light, including X-rays, radio waves, and gamma rays.
Because light has a finite speed, looking at distant objects means seeing them as they were in the past. Light from the Sun takes about 8 minutes to reach us, while light from distant galaxies can take millions of years. Astrophysics in a Nutshell (aka Basic Astrophys...
Astrophysics in a Nutshell: A Guide to the Cosmos Astrophysics is the "love child" of physics and astronomy. While astronomy focuses on observing and describing the night sky, astrophysics uses the laws of physics—like gravity, electromagnetism, and thermodynamics—to explain things happen out there. Core Concepts to Know Most of what we know comes from studying
The dominant force that governs the motion of everything from moons and planets to entire galaxies. Astrophysics in a Nutshell: A Guide to the
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