Astronomy Current Affairs - 2019

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Oumuamua: Alien asteroid discovered in Solar system

Scientists have discovered an asteroid named Oumuamua (or (514107) 2015 BZ509) nestling in Jupiter’s orbit that had migrated from another star system. It makes it first known permanent immigrant to our solar system. It   confirms suspicions of scientists’ that asteroids from other stars have arrived in our solar system. The asteroid Oumuamua was actually first Read More…

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K2-229b: Hot, metallic Earth-sized planet discovered

Scientists using Kepler 2 telescope have discovered hot, metallic, Earth-sized planet named K2-229b orbiting dwarf star located 260 million light years away. They had employed Doppler spectroscopy technique also known as ‘wobble method‘ to discover and characterise this faraway planet. K2-229b K2-229b planet is almost 20% larger than Earth but has mass which is over two-and-a-half Read More…

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Proxima Centauri may host planetary system: Study

Scientists have detected dust belts around Proxima Centauri, a finding that indicates presence of elaborate planetary system hosted by closest star to solar system. These new observations were made by Atacama Large Millimeter Array (ALMA) observatory in Chile. Key Facts The new observations reveal emission from clouds of cold cosmic dust surrounding star. It revealed Read More…

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Scientists detect Gravitational waves for fourth time

Scientists have successfully detected gravitational waves for fourth time coming from merger of two massive black holes. It was for first time, these waves were simultaneously detected by US-based Laser Interferometer Gravitational-wave Observatory (LIGO) and Italy-based Virgo detectors. The first two detection were made in September and December 2015 in quick succession and for third Read More…

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Osiris-Rex: NASA’s asteroid-bound spacecraft swings by Earth

NASA’s asteroid-chasing spacecraft Osiris-Rex successfully swung by Earth to put it on desired trajectory towards near earth asteroid Bennu using Earth’s gravity. It passed within 17,237 kilometres from Earth above Antarctica. During closest flyby, Osiris-Rex’s science instruments were tested by scanning Earth and moon as a practice for its operations at Bennu. OSIRIS-REx The OSIRIS-REx Read More…

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2006 VW139/288P: Astronomers spot strange binary asteroid with comet-like features

International team of astronomers using NASA’s Hubble Space Telescope have spotted an unusual object called 2006 VW139/288P having two asteroids orbiting each other with comet-like features. These include bright halo of material, called a coma, and long tail of dust. The odd object is first known binary asteroid that is also classified as a main-belt Read More…

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Scientists for first time observe Optical polarisation phenomenon of fast spinning star

Scientists for first time have observed Optical polarisation phenomenon (polarised light emitted by rapidly rotating stars) after it was predicted by Indian astrophysicist and Nobel laureate Subrahmanyan Chandrasekhar 70 years ago. Optical polarisation phenomenon is a measure of the orientation of the oscillations of a light beam to its direction of travel. Key Facts The Read More…

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