Displaying items by tag: Nebula
Wide-field mosaic of Messier 8 The Lagoon Nebula and Messier 20 The Trifid Nebula. Messier 8 is an emission nebula HII region in Sagittarius. Several collapsing clouds know as Bok globules are visible which may eventually collapse down to form new stars. Messier 20 is highlighted by three different types of nebula. The red parts are an emission nebula, the blue parts are a reflection nebula, and the dark bands are dark nebula which are clouds of dust and gas blocking light from behind.
Messier 17 is a H II region located in Sagittarius. Similar to the Orion Nebula, but more massive and viewed edge on. The main part of the nebula spans some 15 light years and is home to some current 800 stars with many more thousands being born in outer layers. At around 1 million years old, it is forming a young open cluster of stars.
Messier 16 or as commonly call the Eagle Nebula, or Star Queen Nebula is an open cluster and nebula located in the constellation of Serpens. The central spires of dust and gas were made famous by the Hubble's "Pillars of Creation" image. The pillars and other regions of the nebula host new star formation. The central spire is some 9.5 light years in length. The age of the cluster is around 5 million years.
The nebula patterns and brightness slowly changes over months and years from shadows of dust clouds illuminated by the star R Monocerotis, which in itself encased in a dust cloud. Discovered by William Herschel, and studied by Edwin Hubble who it is named after.
An animated sequence of yearly images of the nebula, how much is due to different processing and different scopes and camera I don't know, but changes are visible in the nebula.
NGC 7023 is a refection nebula, blue light from central hot young star SAO 19158 reflects off the dust grains illuminating the nebula. The nebula spans some 6 light years across. Spent some 33 hours imaging this object over August and September 2019.
NGC 2261 - Hubble's Variable Nebula. Patterns in the nebula vary over time probably due to dust clouds that cover the star R Monocerotis at the tip are casting shadows on the illuminated nebula. Located in the constellation of Monoceros. It is at a distance of 2,500 light years away. The star R Monocerotis is a T Tauri type of variable star which is an young star that hasn't yet entered the main sequence for stars. Imaged over several nights with an Explore Scientific 127 mm refractor and Atik 314l+ mono ccd camera using Clear, Red, Green, and Blue filters.
NGC 2024 - Flame Nebula, Barnard 33 - Horse Head Nebula, and the bright star Alnitak that ionizes the Flame causing it to glow. Thicker patches of dust and gas in front of the nebula shows up as the dark patches. The center of the nebula contains a cluster of stars, many newly formed.
The Horse Head Nebula is a dark nebula that lies in front of an area of ionized hydrogen gas that is energized by the star Sigma Orionis. It also is a stellar nursery containing newly and currently forming stars.
Both are part of the Orion Molecular Cloud.
Cropped version as the bright stars in that area causes nice rainbow patterns in my camera. 80mm refractor and Asi071 camera.
Messier 1 is a supernova remnant located in Taurus. In 1054, Chinese astronomers recorded a bright new star that faded away over time. For awhile it was the 2nd brightest object in the night sky after the Moon shining at a magnitude of -7. Venus on occasions will only make it to around -4,8 magnitude. Independently discovered by Charles Messier while looking for Halley's Comet, it gave him the ideal to record non-moving objects that could be mistaken for comets. It is also called the Crab Nebula because of a drawing William Parsons made that he thought it resembled a crab.
At the heart of the nebula is a pulsar, which is the remains of the progenitor star that collapsed down to a neutron star. The highly magnetized star is spinning around 30 times a second that creates the pulses of radiation. The progenitor star was thought to be between 9 and 11 solar masses, the existing star is around 1.4 to 2 solar masses and is compressed down to a size less that 30 kilometers across.
The Orion Nebula or M42 is one of the brightest nebulae in the sky, visible as a "fuzzy" star in Orion's sword hanging from the belt. The Trapezium cluster named for the four brightest OB stars form a trapezoid figure ionizes and illuminates the nebula. The nebula contains hundreds of young stars and more than 700 stars associated with the cluster.
he Bubble Nebula or NGC 7635 is an hydrogen emission nebula with a bubble structure that is formed by stellar wind from a massive central star. Also in the field of view is the open cluster of Messier 52. M 52 is at a distance of 4,600 light years and the Bubble Nebula is a more distant 7,000 to 11,000 light years away.