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In the time since the first exoplanet was discovered in 1992, astronomers have detected more than 5,000 planets orbiting other stars. But when astronomers detect a new exoplanet, we don't learn a lot ...

Approximately 4.5 billion years ago, a cold cloud of gas and dust buried deep in one of the Milky Way galaxy’s spiral arms started to collapse. From there, gravity worked its magic. The cloud began to ...

Evidence pointing toward the existence of an undiscovered ninth planet in the solar system may actually indicate our ideas of gravity are incorrect. Such is the conclusion of two scientists who ...

As you're reading this, NASA's records read some 250 spacecraft sent into space, carrying with them either humans or our hopes for some revolutionary discovery. None of them have actually left our ...

Physicists have created a mini sun with its own simulated gravity to investigate the causes of extreme space weather. The tiny sun — consisting of a superheated plasma inside a 1-inch-wide ...