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Sunspot - Wikipedia
Sunspot number also changes over long periods. For example, from 1900 to the 1960s, the solar maxima trend of sunspot count was upwards; for the following decades it diminished. However, the Sun was last as active as this period over 8,000 years ago.
Star - Life Cycle & Special Characteristics of the Stars ...
A star is a large mass of plasma matter held together by gravitational forces. Near the end of its life a star can also have a significant portion of degenerate matter. Sun is the star nearest Earth. At night other stars become visible when not obscured by the Sun’s light or atmospheric interference. In the […]
Stellar Structure
Stellar Structure:. Stars form from clouds of gas and collapse under self-gravity. The collapse is stopped by internal pressure in the core of the star.
Earth to exoplanet: Hunting for planets with machine learning
For thousands of years, people have looked up at the stars, recorded observations, and noticed patterns. Some of the first objects early astronomers identified were planets, which the Greeks called “planētai,” or “wanderers,” for their seemingly irregular movement through the night sky.
Achernar / Alpha Eridani - SolStation.com
Other Information. Try Professor Jim Kaler's Stars site for other information about Achernar at the University of Illinois' Department of Astronomy. Older catalogue information on Achernar is also available from www.alcyone.de. Up-to-date technical summaries on this star can be found at: the HIPPARCOS Catalogue using the VizieR Search Service mirrored from the Centre de Données astronomiques ...
Messier 67 - Wikipedia
Messier 67 (also known as M67 or NGC 2682) is an open cluster in the constellation of Cancer.M67's Trumpler class is variously given as II 2 r, II 2 m, or II 3 r. It was discovered by Johann Gottfried Koehler in 1779. Age estimates for the cluster range between 3.2 and 5 billion years, with the most recent estimate (4 Gyr) implying stars in M67 are younger than the Sun.
Sun Has Likely Entered New Evolutionary Phase ... - Forbes
The Sun has likely already entered into a new unpredicted long-term phase of its evolution as a hydrogen-burning main sequence star --- one characterized by magnetic sputtering indicative of a ...
Barnard's Star - SolStation.com
Other Information. Try Professor Jim Kaler's Stars site for other information about Barnard's Star at the University of Illinois' Department of Astronomy. Up-to-date technical summaries on Barnard's Star can be found at: the Astronomiches Rechen-Institut at Heidelberg's ARICNS, the NASA Star and Exoplanet Database, and the Research Consortium on Nearby Stars () list of the 100 Nearest Star ...
Betelgeuse - New World Encyclopedia
Betelgeuse (also called Alpha Orionis, α Orionis, or α Ori) is one of the brightest and largest known stars, though it is not one of the most massive.Located approximately 600 light-years from Earth, it is part of the constellation Orion and a vertex of the Winter Triangle asterism.
Cosmic ray | physics | Britannica.com
Cosmic ray: Cosmic ray, a high-speed particle—either an atomic nucleus or an electron—that travels through space. Most of these particles come from sources within the Milky Way Galaxy and are known as galactic cosmic rays (GCRs). The rest of the cosmic rays originate either from the Sun or, almost certainly in