Venus and the crescent Moon put on a show in the evening sky on Feb 27, 2009.
The telescope technique of adaptive optics is rapidly advancing, allowing unprecedented ground-based views of distant galaxies. Astronomers with the European Southern Observatory recently used adaptive optics to spot details in the core of NGC 253, one of the brightest and dustiest spiral galaxies in the sky.
January 24, 2009 is the 84th anniversary of the last total solar eclipse that was visible from New York City. On January 24, 1925, the southern portion of the Moon's umbral shadow passed across upper Manhattan, parts of Queens and all of the Bronx.
Astronomers have used data from HST and Spitzer to construct the 3-D evolution of the supernova remnant Cassiopeia A.