Globular clusters (like M2, shown here) are balls of 10s to 100s of thousands of stars that orbit our Galaxy as well as other galaxies. Generally they are made up of older lower metal stars. We don't have a good idea on how they form or where they come from. #astrophoto
At the end of their lives stars greater than 8 times the mass of the Sun explode in a supernova. Pictured is the Crab Nebula, a remnant of a supernova witnessed in 1054. In the centre of the nebula is a rapidly spinning neutron star called a pulsar, the remnant of the star. #astrophoto
Jupiter and its 4 large moons. These moons are easily observed through a pair of binoculars and if you watch them night after night you can see them orbit Jupiter.
This is a composite image since to see the moons Jupiter has to be over exposed. #astrophoto
M103 is an open cluster in the constellation of Cassiopeia. As an open cluster, M103 is a collection of young stars that have left the nebula that they were formed in and are now starting to disperse into the galaxy. #astrophoto
Reprocess of data. First image is an HDR merge in photoshop of the two other images of M51. The other two images are the same data at different screen stretches. #astrophoto
Though many astronomical images are quite stunning, they can also be kind of underwhelming, especially if taken for scientific reasons. Here's a colour image of the PN NGC6058 made from science images. I've included a crop so you can find it. #astrophoto
M42 - the Great Nebula in Orion is an easy to find star formation region in the constellation of Orion. Seen here in oxygen, hydrogen, and sulphur light, it is an easy object to find in binoculars and worth the look in binoculars or any telescope. #astrophoto
Here is a photo of part of the Virgo cluster of galaxies. Our own Galaxy and associated Local Group are also associated with this cluster being part of the Virgo super cluster, of which the Virgo cluster is more or less the centre. (Image from Rothney Astrophysical Observatory Baker Nunn Telescope)
M63 is a type of spiral galaxy known as a flocculent spiral as it doesn't have well defined spiral arms. Located about 30 Mly away from us in the constellation Canes Venatici and was first observed in 1779. It is commonly called the Sunflower Galaxy. #astrophoto
Last Wednesday's astrotoot image if the N. America nebula has an interesting provenance. Taken with the 0.5m RAO Baker-Nunn telescope it shouldn't be in colour as the BN doesn't have the ability to have a filter put in front of the imager.
Colour images of space are usually 3 pictures, taken through different colour filters and then combined to make a colour image. Since the Baker-Nunn was originally designed to track Soviet satellites, it was never designed to take filtered images.
The North America and Pelican nebulae are actually the same cloud of hydrogen gas. Their shape and separation are caused by a cloud of dark dust between us and the emission nebula. #astrophoto
Teacher, astronomer, political scientist and father. I wrote a book once: http://evl.link/df
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