Science Updates

Near Earth Object
October 11, 2013
Don Quixote: An Asteroid that is a Living Comet

Near Earth Objects (NEOs) are asteroids or comets whose orbits sometimes bring them close to the earth's orbit. An NEO could therefore someday collide with the Earth -- giving them considerably more parochial interest than most objects in astronomy.

Sirius A and B
October 4, 2013
Runaway Binary Stars

CfA astronomers made a remarkable and fortuitous discovery in 2005: an extremely fast moving star, clocked going over three million kilometers an hour.

September 26, 2013
The Intergalactic Medium in the Young Universe

In its earliest years, the universe was so hot that electrons and protons could not bind together in neutral atoms: all of the gas in the cosmos was ionized.