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The first one, the proton–proton chain reaction, is the dominant energy source in stars with masses up to about the mass of the Sun. The second process, the carbon–nitrogen–oxygen cycle , which was also considered by Carl Friedrich von Weizsäcker in 1938, is more important in more massive main-sequence stars.
The Star-Spectroscope of the Lick Observatory in 1898. Designed by James Keeler and constructed by John Brashear.. Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, ultraviolet, X-ray, infrared and radio waves that radiate from stars and other celestial objects.
This is a list of star systems within 400–450 light years of ... Stars in system Spectral type ... The closest red supergiant star and one of the closest supernova ...
40 Eridani is the system's Flamsteed designation and ο² Eridani (Latinised to Omicron 2 Eridani) its Bayer designation.The designations of the sub-components – 40 Eridani A, B and C – derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).
Modern images are made using digital detectors, particularly using charge-coupled devices (CCDs) and recorded on modern medium. Although visible light itself extends from approximately 4000 Å to 7000 Å (400 nm to 700 nm), [58] that same equipment can be used to observe some near-ultraviolet and near-infrared radiation.
The most powerful telescope to be launched into space has made history by detecting a record number of new stars in a distant galaxy. ... 44 individual stars in a galaxy 6.5 billion light-years ...
The first list shows a few of the known stars with an estimated luminosity of 1 million L ☉ or greater, including the stars in open cluster, OB association and H II region. The majority of stars thought to be more than 1 million L ☉ are shown, but the list is incomplete. The second list gives some notable stars for the purpose of comparison.
The team of astronomers did not expect to find the trove of stars while studying Webb images of a galaxy known as the Dragon Arc. Fortuitously, the light from the stars was magnified by a massive ...