Alhena, Gamma Geminorum (γ Gem), is a spectroscopic binary star system located in the northern constellation Gemini.With an apparent magnitude of 1.915, it is the third brightest point of light in Gemini, after Pollux and Castor.Alhena lies at an approximate distance of 109 light years from Earth. Echo Mapping in a Black Hole Accretion Disk and Torus (Animation). Simplified finder chart for Propus - η Geminorum (eta Geminorum). Mit dem scheinbaren Durchmesser am Himmel von etwa 50 Bogenminuten ist der Nebel eine Blase mit einem Durchmesser … Image credit: NASA/JPL-Caltech/UCLA, NASA - National Aeronautics and Space Administration, Follow this link to skip to the main content. The tradition name Tejat Prior is a Greek Word which means meaning forward foot. In the left panel, a streak of debris falls toward the disk. Propus is distant The northeastern shell was probably created by a fast shock wave (100 kilometers per second or 223,700 miles per hour), whereas the southern shell was probably created by a slow shock wave (30 kilometers per second or 67,100 miles per hour). Pollux and its neighbour Castor mark the heads of the celestial Twins, represented by the constellation Gemini. Timezone: Europe/London. Stars with mass similar to the sun typically become planetary nebulae at the end of their lives, whereas stars with many times the sun's mass explode as supernovae. All WISE featured images use color to represent specific infrared wavelengths. This oddly colorful nebula is the supernova remnant IC 443 as seen by NASA's Wide-field Infrared Survey Explorer, or WISE. Propus is a visual double star What is unusual about the IC 443 is that its shell-like form has two halves that have different radii, structures and emissions. This oddly colorful nebula is the supernova remnant IC 443 as seen by NASA's Wide-field Infrared Survey Explorer, or WISE. the Hertzsprung–Russell diagram. The blast from the supernova sent out shock waves that traveled through space, sweeping up and heating the surrounding gas and dust in the interstellar medium, and creating the supernova remnant seen in this image. Black Hole Corona's Disappearing Act (Illustration), Site Editors: Tony Greicius, Randal Jackson, Naomi Hartono, Wide-field Infrared Survey Explorer (WISE). The northeastern shell appears violet, indicating a mixture of longer infrared wavelengths from cooler dust (red) and shorter infrared wavelengths from luminescent gas (blue). The table below Because of its moderate brightness, Propus should be easily visible from locations with dark skyes, while it The red arrow shows the motion of Propus during the next. This is the remnant of a supernova. The table below shows key The smaller southern shell, seen here in a bright cyan color on the bottom half of the image, is constructed of denser clumps and knots primarily emitting light from hydrogen gas and heated dust. Even though they are referred to as twins and appear similar in brightness, the two stars are very different. Blue represents 3.4-micron light, cyan represents 4.6-micron light, green represents 12-micron light and red represents 22-micron light. Caltech manages JPL for NASA. The color differences seen in this image represent different wavelengths of infrared emission. The bright star at right is Eta Geminorum, the bright star at left is Mu Geminorum. In the right panel, the debris has dispersed some of the gas, causing the corona to disappear.

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