अंतरिक्ष विज्ञान – Page 13 – आवारा मुसाफिर

New planet detected around star closest to the Sun

February 12, 2022761 Views

A team of astronomers using the European Southern Observatory’s Very Large Telescope (ESO’s VLT) in Chile have found evidence of another planet orbiting Proxima Centauri, the closest star to our Solar System. This candidate planet is the third detected in the system and the lightest yet discovered orbiting this star. At just a quarter of Earth’s mass, the planet is also one of the lightest exoplanets ever found. “The discovery shows that our closest stellar neighbour seems to be packed with interesting new worlds, within reach of further study and future exploration,” explains João Faria, a researcher at the Instituto de Astrofísica e Ciências do Espaço, Portugal and lead author of the study published today in Astronomy & Astrophysics. Proxima Centauri is the closest star to the Su...

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Volcano in Costa Rica shows how life might have existed on Mars

AWARA MUSAFIR BUREAU

January 31, 2022629 Views

Extremely harsh volcanic lake is dominated by bacteria from a single 'extremophile' genus A few specialist microbes survive conditions analogous to those of Mars’ early history, reports a new publication in Frontiers in Astronomy and Space Science—and this may be thanks to a broad range of adaptations. The hydrothermal crater lake of the Poás volcano in Costa Rica is one of the most hostile habitats on the planet. The water is ultra-acidic, full of toxic metals and the temperatures range from comfortable to boiling. In addition, recurrent ‘phreatic eruptions’ cause sudden explosions of steam, ash and rock. Despite such deadly eruptions, hydrothermal environments may be where the earliest forms of life began on Earth—and potentially also on Mars, if there ever was life. Beyond discov...

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Scientists amazed by blinking star’s ‘totally unexpected’ behavior

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January 28, 2022259 Views

Scientists have detected what appears to be an incredibly dense star behaving unlike anything else ever seen - and suspect it might be a type of exotic astrophysical object whose existence has until now been only hypothesized. The object, spotted using the Murchison Widefield Array telescope in outback Western Australia, unleashed huge bursts of energy roughly three times per hour when viewed from Earth during two months in 2018, the researchers said. An artist's impression of an object located roughly 4,200 light years from our solar system that may be a type of neutron star - the dense, collapsed core of a massive star that exploded as a supernova - called a magnetar, in this handout image obtained January 27, 2022. The object was detected using the Murchison Widefield Array teles...

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Capturing All That Glitters in Galaxies with NASA’s Webb

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January 22, 2022329 Views

An international research team will survey the stars, star clusters, and dust that lie within 19 nearby galaxies Spirals are some of the most captivating shapes in the universe. They appear in intricate seashells, carefully constructed spider webs, and even in the curls of ocean waves. Spirals on cosmic scales – as seen in galaxies – are even more arresting, not only for their beauty, but also for the overwhelming amount of information they contain. How do stars and star clusters form? Until recently, a complete answer used to lie out of reach, blocked by gas and dust. Within the first year of operations, NASA’s James Webb Space Telescope will help researchers complete a more detailed sketch of the stellar life cycle with high-resolution infrared-light images of 19 galaxies. FILE PH...

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Second alien moon identified is much like the first: big and strange

AWARA MUSAFIR BUREAU

January 13, 2022545 Views

For only the second time, astronomers have detected what appears to be a moon orbiting a planet in another solar system. Just like the first time, this one has traits suggesting that such moons may differ greatly from those populating our solar system. Data obtained by NASA's Kepler space telescope before it was retired in 2018 indicated the presence of a moon 2.6 times the diameter of Earth orbiting a Jupiter-sized gas giant about 5,700 light-years away from our solar system in the direction of the Cygnus and Lyra constellations, scientists said on Thursday. A light-year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km). An artist's rendering shows a moon with a diameter roughly 2.6 times that of Earth orbiting a large gas giant planet in another sola...