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Star Betelgeuse - A red supergiant in the constellation Orion

One fascinating star is Betelgeuse, a red supergiant located in the constellation Orion. Here are some intriguing facts about it: 1. Size and Volume: Betelgeuse is immense—if placed at the center of our solar system, it would extend past the orbit of Mars. 2. Variability: It is a pulsating variable star, meaning its brightness changes over time; it has been observed to vary in brightness over several months. 3. Life Cycle: Betelgeuse is nearing the end of its life cycle and is expected to explode as a supernova within the next million years, a relatively short time in astrophysical terms. 4. Distance: It is located approximately 640 light-years away from Earth. 5. Cultural Significance: Betelgeuse has been significant in many cultures and is commonly referred to as the “Shoulder of the Hunter” in the constellation Orion. 6. Color Indicator: Its reddish hue signifies a cooler surface temperature compared to other stars, which gives it a distinctive appearance. Betelgeuse con...

Researchers discover a six-planet system with near 3:2 resonance

Almost visible to the naked eye in the Draco constellation, the star HD 158259 has been observed for the last seven years by astronomers using the SOPHIE spectrograph. This instrument, installed at the Haute-Provence Observatory in the South of France, acquired 300 measurements of the star. The analysis of the data which done by an international team led by researchers from the University of Geneva (UNIGE), has resulted in the discovery that HD 158259 has six planetary companions: a "super-Earth" and five "mini-Neptunes." These planets display an exceptionally regular spacing, which hints at how the system may have formed. This study, published in the journal Astronomy & Astrophysics, also includes TESS space telescope observations of the star, which unveil the density of the innermost planet.

from Astronomy News - Space News, Exploration News, Earth Science News, Earth Science https://ift.tt/3ctFNMR

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