Cambridge, MA Does a twin Earth exist somewhere in our galaxy? Astronomers are getting closer and closer to finding an Earth-sized planet in an Earth-like orbit. NASA's Kepler spacecraft...

BL Lacertae objects (BL Lacs) are a particularly enigmatic group of galaxies. In one regard they are like many other galaxies: they have nuclei with very energetic processes ongoing that...

Cambridge, MA A new image from NASA's Spitzer Space Telescope offers a rare view of an imminent collision between the cores of two merging galaxies, each powered by a black hole with mil...

The size and shape of our home galaxy, the Milky Way, is essential information because it contains the story of the structure and evolution of our cosmic neighborhood. But it also is im...

CfA astronomer David Charbonneau, the Thomas D. Cabot Associate Professor of Astronomy at Harvard University, will receive the NSF 2009 Alan T. Waterman Award for his work on the developm...

The hot outer region of the sun's atmosphere, its corona, is threaded by intense magnetic fields that extend upwards from the surface , often forming loops that are twisted and sheared by...

Magnetic fields play an important but poorly understood role in the formation and evolution of stars -- important because magnetic fields stretch around a hot medium like a rubber band an...

Cambridge, MA On long, dark winter nights, the constellation of Orion the Hunter dominates the sky. Within the Hunter’s sword, the Orion Nebula swaddles a cluster of newborn stars called...

Astronomers have found that complex molecules, including organic species, exist in numerous kinds of places in the cosmos, especially in the giant molecular clouds of gas and dust where n...

The CfA announces a symposium celebrating Giovanni Fazio and his long and distinguished career of research, discovery, and teaching on the occasion of his 75th birthday. Two full days of ...