During the morning hours of Sunday, Sept. 22, skywatchers across much of the western US will be able to watch as a waning gibbous moon — 75 percent illuminated by the sun — crosses in front of ...

A new study reveals that the Pleiades is the core of a once-much-larger cluster, many of whose members have scattered to the ...

You might want to start your Sunday extra early this weekend. That's because on June 22, a triangular arrangement of the waning crescent moon flanked by Venus and the Pleiades star cluster will be ...

PENNSYLVANIA, USA — High above the horizon on crisp autumn nights, a shimmering cluster of blue-hued stars begins to appear. Known as the Pleiades, or the seven sisters, these stars have been ...