mei 132013
 
 First Exoplanet Found by Using New Method

  Detecting alien worlds presents a significant challenge since they are small, faint, and close to their stars. The two most prolific techniques for finding exoplanets are radial velocity (looking for wobbling stars) and transits (looking for dimming stars). A team at Tel Aviv University and the Harvard-Smithsonian Center for Astrophysics (CfA) has just discovered [continue reading]

feb 202012
 
Pulsars Put Einstein’s Theory of Relativity to the Test

A still from a pulsar animation. Astronomers are using pulsars to test Einstein’s theory of relativity. (NASA)   Pulsars are highly magnetized, rapidly rotating neutron stars that emit beams of radio waves from their magnetic poles. Astronomers are now using them to test one of Einstein’s theories and study nuclear physics. Once massive stars that [continue reading]