Cosmology & Astrophysics
Why Do Stars Burn and What Happens When They Die?
Stars don't last forever. Why do stars burn? What happens when a star dies? How does its collapse manifest?
What Is Inflation Theory?
Inflation theory is the idea in cosmology that in the very early stages after the universe's creation it underwent a rapid expansion, the effects of which can still be seen in the universe today.
History of the Universe
Images of the cosmic microwave background radiation and how the universe evolved.
What Is the Anthropic Principle?
As physicists explore the parameters that control the universe, it's amazing how perfectly the universe seems to allow for life. How can physicists possibly explain this? Learn about the fascinating principle at the heart of scientific understanding of the origins of the universe.
What is the Big Bang Theory?
One of the most impressive theories of the 20th century, the Big Bang explains the origins of the universe ... at least up to a point. Find out what the theory actually says, what it does not say, and what it may or may not say.
What is a Black Hole?
A black hole is a curvature of spacetime geometry due to an intense gravitational field. The effects of a black hole are so extreme that even light cannot escape it, thus the name.
What Is Olbers' Paradox?
Olbers' paradox is an ancient question: Why is the night sky dark? If space goes on infinitely far in all directions, then light from all of those stars should be making their way to us, turning the night sky as bright as day (or brighter). The fact that it's dark is in itself a good reason to believe in a non-static universe.
Kepler's Laws of Planetary Motion
Kepler's Laws describe, in three concise rules, the motion of orbital bodies in the solar system.
Heliocentric Universe Model
The heliocentric model of the universe tells us that the Earth revolves around the sun rather than the other way around. How was this model arrived at? What is the evidence to support it? Why did it take so long to accept?
Cryogenic Dark Matter Search (CDMS)
The Cryogenic Dark Matter Search experiment, in the Soudan Mine in Minnesota, seeks to discover direct observational evidence of dark matter.
What is Hawking Radiation?
Hawking radiation is an explanation of how radiation can be emitted from a black hole, despite its attractive power, due to quantum effects.
About.com Astronomy & Space Guidesite
For more detailed information on space and astronomy, check out the About.com Astronomy Guide.
What Is Cosmology?
Cosmology is the discipline of physics that involves the study of the origins, history, and evolution of the universe and the objects within it.
The major popular magazine in the space sciences, Astronomy provides excellent information for those interested in the physics of space, or those who just like looking with wonder into the night sky.
Eric Weisstein's World of Astronomy
Eric Weisstein's World of Astronomy is a site full of astronomy information, located on the Wolfram Research website.
Cosmic Journey: A History of Scientific Cosmology
This fantastic website on the history of scientific cosmology is maintained by the American Institute of Physics.
Astronomy Now Online
Astronomy Now is a popular UK-based astronomy magazine, which features a wide range of content and articles in its online publication.
The Astrophysical Journal
This journal of astrophysical research publishes abstracts and full papers online.
What is the Alpher-Bethe-Gamow Paper?
The Alpher-Bethe-Gamow paper is a famous paper in the history of physics. In addition to laying the groundwork for how particles in our universe was created, it is amusing because the names of the three authors (one of whom wasn't directly involved) sounds like the first three letters of the Greek alphabet: alpha-beta-gamma.
Official NASA Website
This is the official website of the National Aeronautics and Space Administration (NASA), which maintains a lot of great information on the space sciences.
NASA's Astronomy Picture of the Day
This Astronomy Picture of the Day is featured on the NASA website, accompanied by a description of the picture with commentary by a professional astronomer.