PIX4568671: Open cluster NGC 7789 in Cassiopee - Open cluster NGC 7789 in Cassiopeia - The cluster of stars NGC 7789 is located about 7600 years - light from Earth. It contains about 300 stars, including a number of giant red stars. His age is estimated at 1.6 billion years. The open cluster NGC 7789 in Cassiopeia is a bright and richly populated cluster comprised of approximately 300 member stars which are evenly distributed and well detached from the background sky. This cluster lies at a distance of 7620 light - years away with an apparent diameter of 25 '. As indicated by the various red giants in the image, the cluster is advanced in age and which has been estimated to be approximately 1.6 billion years - old / Bridgeman Images
PIX4568697: Open Cluster of Pleiades - The Pleiades star cluster - The Pleiades cluster is a cluster of about 500 young stars nees 150 million years ago. Visible in the constellation Taurus, this cluster is 440 years from the Earth. The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is one of the brightest and famous star clusters visible in the northern hemisphere. It consists of about 500 bright, hot, young stars that were all born at the same time between 75 and 150 million years ago within a large cloud of dust and gas. The cluster contains many stars, of which only a handful are commonly visible to the naked eye. The blue haze that accompanies them is due to very fine dust which still remains and preferentially reflects the blue light from the stars. This star cluster lie some 440 light years away from the Earth, in the constellation of Taurus / Bridgeman Images
PIX4568855: Hyades and Pleiades open clusters - Hyades and Pleiades open clusters - The Hyades cluster, on the left, with the brilliant star Aldebaran. On the right, the Pleiades cluster. These two clusters belong to the constellation of the Taurus of which Aldebaran is the brightest star; it is a red giante. The Hyades is seen at left, containing the bright star Aldeberan. The Pleiades is at right. Both are open clusters in the constellation of Taurus. This skyview is corresponding to binoculars and small telescopes / Bridgeman Images
PIX4569073: Open cluster Westerlund 1 in the Altar - Open cluster Westerlund 1 in Ara - The open cluster Westerlund 1 is located about 16,000 years - light in the southern constellation of the Altar. It contains hundreds of very young massive stars as well as the supergiant red star W26. Image obtained by the VST telescope in Chile. This exceptionally bright cluster lies about 16 000 light - years from Earth in the southern constellation of Ara (The Altar). It contains hundreds of very massive and brilliant stars, all of which are just a few million years old - - babies by stellar standards. But our view of this cluster is hampered by gas and dust that prevents most of the visible light from the cluster's stars from getting to Earth. Around one of the stars - - known as W26, a red supergiant and possibly the biggest star known - - astronomers have discovered clouds of glowing hydrogen gas, shown as green features in this new image. Such glowing clouds around massive stars are very rare, and are even rarer around a red supergiant - - this is the first ionised nebula discovered around such a star. W26 itself would be too cool to make the gas glow; the astronomers speculate that the source of the ionising radiation may be either hot blue stars elsewhere in the cluster, or possibly a fainter, but much hotter, companion star to W26. W26 will eventually explode as a supernova. The nebula that surrounds it is very similar to the nebula surrounding SN1987A, the remnants of a star that went supernova in 198 / Bridgeman Images
PIX4569327: Sundial - Invalides - Paris - Sundial in Paris - Hotel des Invalides: The sundials of the western facade of the monument of the Hotel des Invalides. In the court of honour, the hour was given on each facade: to the north, by a clock and on the other three facades, by seven solar dials. If the clock is missing, the dials are still visible / Bridgeman Images
PIX4593618: Constellation of Sagittarius - Sagittarius constellation and clouds - In superprint, the mythological form of this constellation, extracted from the Uranographia of Hevelius. 5 July 2007, Beg Meil (Finistere - France). Sagittarius constellation and clouds above the sea. Constellation mythological form from “” Uranographia”” star atlas by Hevelius (1690) has been added. July 5 2007, Beg Meil (Finistere - France) / Bridgeman Images
PIX4593643: Summer sky - Summer sky - In summer, the lactee road rises brightly above the southern horizon. From left to right are the constellations of Aquarius, Capricorn, Sagittarius and only the tail of the Scorpio emerge from behind the horizon. At the top of the picture are the constellations of the Dauphin and the Aigle. 13 August 2006, Treguennec (Finistere - France). Summer sky with the milky way above south horizon. August 13 2006, Treguennec (Finistere - France) / Bridgeman Images