assodicuori639
M 45 T 26 -3
M 45, it's only 20 minutes of exposure in LRGB with PlaneWave DeltaRho 500 Astrograph 508/1537 F 3/0 camera ZWO ASI 2600 MM, it's 20 shots, 5x60 seconds for each filter, processing with Pixinsight and Photoshop. The Pleiades (also known as the Seven Sisters, the Hen or by the abbreviation M45 in Charles Messier's catalogue) are an open cluster in the constellation Taurus. This rather close cluster (440 light-years) has several stars visible to the naked eye. In city circles you can see only four or five of the brightest stars, in a darker place even twelve. All the components are surrounded by light reflection nebulae, which can be observed especially in long-exposure photographs taken with telescopes of considerable size.
It is remarkable that the stars of the Pleiades are really close to each other, have a common origin and are linked by the force of gravity.
Given their distance, the stars visible in the Pleiades are much hotter than normal, and this is reflected in their color: they are blue or white giants; The cluster actually has hundreds of other stars, most of which are too far away and cold to be seen with the naked eye. The Pleiades are a young cluster, with an estimated age of about 100 million years and an expected lifetime of only another 250 million years, as the stars are too far apart.
Because of their brilliance and proximity to each other, the brightest stars in the Pleiades have been known since antiquity: they are mentioned, for example, by Homer and Ptolemy. The Nebra Disk, a bronze artifact from 1600 BC found in the summer of 1999 in Nebra, Germany, is one of the oldest known representations of the cosmos: in this disk the Pleiades are the third clearly distinguishable celestial object after the Sun and the Moon.
Since it was discovered that stars are celestial bodies similar to the Sun, it began to be hypothesized that some were somehow related to each other. Thanks to the study of proper motion and the scientific determination of the distances of the stars, it became clear that the Pleiades are really gravitationally bound and that they have a common origin.
M 45 T 26 -3
M 45, it's only 20 minutes of exposure in LRGB with PlaneWave DeltaRho 500 Astrograph 508/1537 F 3/0 camera ZWO ASI 2600 MM, it's 20 shots, 5x60 seconds for each filter, processing with Pixinsight and Photoshop. The Pleiades (also known as the Seven Sisters, the Hen or by the abbreviation M45 in Charles Messier's catalogue) are an open cluster in the constellation Taurus. This rather close cluster (440 light-years) has several stars visible to the naked eye. In city circles you can see only four or five of the brightest stars, in a darker place even twelve. All the components are surrounded by light reflection nebulae, which can be observed especially in long-exposure photographs taken with telescopes of considerable size.
It is remarkable that the stars of the Pleiades are really close to each other, have a common origin and are linked by the force of gravity.
Given their distance, the stars visible in the Pleiades are much hotter than normal, and this is reflected in their color: they are blue or white giants; The cluster actually has hundreds of other stars, most of which are too far away and cold to be seen with the naked eye. The Pleiades are a young cluster, with an estimated age of about 100 million years and an expected lifetime of only another 250 million years, as the stars are too far apart.
Because of their brilliance and proximity to each other, the brightest stars in the Pleiades have been known since antiquity: they are mentioned, for example, by Homer and Ptolemy. The Nebra Disk, a bronze artifact from 1600 BC found in the summer of 1999 in Nebra, Germany, is one of the oldest known representations of the cosmos: in this disk the Pleiades are the third clearly distinguishable celestial object after the Sun and the Moon.
Since it was discovered that stars are celestial bodies similar to the Sun, it began to be hypothesized that some were somehow related to each other. Thanks to the study of proper motion and the scientific determination of the distances of the stars, it became clear that the Pleiades are really gravitationally bound and that they have a common origin.