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February Podcast: Winter’s Milky Way

  From :- Sky & Telescope  By :- J. Kelly Beatty  Editted by :- Amal Udawatta Although the winter Milky Way near Orion is not as bright and distinct as the summer Milky Way, it likewise stretches north to south across the entire sky and is adorned with the most brilliant stars and countless deep-sky objects. Alireza Vafa   February is often the coldest month of the year for northerners, but the Sun is telling a different story. The December solstice came and went several weeks ago, and you can already notice that the days are getting longer, with earlier sunrises and later sunsets. The celestial geometry is changing too, as the Sun races northward among the stars by about 1° every 3 days. But the stars of winter are still firmly in control of the nighttime firmament. Note where the Sun sets and, once twilight envelops you, wheel around to the left until you’re looking in nearly the opposite direction. The night sky’s most dazzling star is Sirius, down near the so...

February Podcast: Winter’s Milky Way

    Constant Contact Use. Please leave this field blank. From :- Sky & Telescope By :- J. Kelly Beatty Editted by :- Amal Udawatta Although the winter Milky Way near Orion is not as bright and distinct as the summer Milky Way, it likewise stretches north to south across the entire sky and is adorned with the most brilliant stars and countless deep-sky objects. Alireza Vafa In this month’s episode, go on a guided tour of the stars and planets that you’ll see overhead during February. First we’ll keep tabs on the Moon; say good-bye to Saturn; trace out the Winter Milky Way; and explore some lesser-known constellations near Orion. Note where the Sun sets and, once twilight envelops you, wheel around to the left until you’re looking in nearly the opposite direction. The night sky’s most dazzling star is Sirius, down near the southeastern horizon. Also known as the Dog Star, Sirius appears so bright partly because it is bright, outshining the Sun by 25 times, and partly because...

Astronomers discover the earliest, hottest galaxy cluster in the universe, and it breaks all the rules

     From :- Space.Com  By :-  By  Keith Cooper  Editted by :_ Amal Udawatta An artist's impression of the galaxy cluster in the very early universe. Containing about 30 galaxies including three with supermassive black holes (depicted here with jets), the cluster is filled with an extraordinarily hot gas (illustrated here in red).   (Image credit: Lingxiao Yuan.) The galaxy cluster appears hotter and more mature than it should for its young age, challenging what we think we know about how these cities of galaxies form. A seemingly impossible cluster of more than 30 galaxies crammed into a volume just 500,000 light-years across has been found in the universe just 1.4 billion years after the Big Bang  —  and with a temperature that breaks all the rules. The discovery, by astronomers using Chile's Atacama Large Millimeter/submillimeter Array ( ALMA ), of the  galaxy  cluster labeled SPT2349-56 challenges our understanding of how quickly gal...