अंतरिक्ष विज्ञान – Page 7 – आवारा मुसाफिर

Astronomers find that two exoplanets may be mostly water

December 16, 2022615 Views

A team led by Université de Montréal astronomers has found evidence that two exoplanets orbiting a red dwarf star are “water worlds,” planets where water makes up a large fraction of the volume. These worlds, located in a planetary system 218 light-years away in the constellation Lyra, are unlike any planets found in our solar system. The team, led by PhD student Caroline Piaulet of the Trottier Institute for Research on Exoplanets (iREx) at the Université de Montréal, published a detailed study of a planetary system known as Kepler-138 in the journal Nature Astronomy. Piaulet, who is part of Björn Benneke's research team, observed exoplanets Kepler-138c and Kepler-138d with NASA's Hubble and the retired Spitzer space telescopes and discovered that the planets – which are about one ...

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NASA’s Orion capsule returns to Earth, capping Artemis I flight around moon

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December 12, 2022241 Views

NASA's Orion capsule barreled through Earth's atmosphere and splashed down in the Pacific ocean on Sunday after making an uncrewed voyage around the moon, winding up the inaugural mission of the U.S. agency's new Artemis lunar program 50 years to the day after Apollo's final moon landing. The gumdrop-shaped Orion capsule, carrying a simulated crew of three mannequins wired with sensors, plunked down in the ocean at 9:40 a.m. PST (1740 GMT) off Mexico's Baja California peninsula, demonstrating a high-stakes homecoming before NASA flies its first crew of Artemis astronauts around the moon in the next few years. U.S. Navy divers attach winch cables to NASA's Orion capsule after being successfully secured by a NASA and U.S. Navy team, off the coast of Baja California, Mexico, 11 Decembe...

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The messy death of a star

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December 10, 2022812 Views

A global forensic team of astronomers led by Australia’s Macquarie University reconstructs using stunning James Webb Space Telescope images Around 2500 years ago, a star ejected most of its gas, forming the beautiful Southern Ring Nebula, NGC 3132, chosen as one of the first five image packages from the James Webb Space Telescope (JWST). A team of nearly 70 astronomers from 66 organisations across Europe, North, South and Central America, and Asia have used the JWST images to piece together the messy death of this star. “It was nearly three times the size of our Sun, but much younger, about 500 million years old. It created shrouds of gas that have expanded out from the ejection site, and left a remnant dense white dwarf star, with about half the mass of the Sun, but approximat...

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Distant black hole is caught in the act of annihilating a star

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December 1, 2022648 Views

Astronomers have detected an act of extreme violence more than halfway across the known universe as a black hole shreds a star that wandered too close to this celestial savage. But this was no ordinary instance of a ravenous black hole. It was one of only four examples - and the first since 2011 - of a black hole observed in the act of tearing apart a passing star in what is called a tidal disruption event and then launching luminous jets of high-energy particles in opposite directions into space, researchers said. And it was both the furthest and brightest such event on record. This undated artist’s impression illustrates how it might look when a star approaches too close to a black hole, where the star is squeezed by the intense gravitational pull of the black hole. Some of the st...

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Webb Space Telescope spots early galaxies hidden from Hubble

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November 19, 2022158 Views

NASA’s Webb Space Telescope is finding bright, early galaxies that until now were hidden from view, including one that may have formed a mere 350 million years after the cosmic-creating Big Bang. Astronomers said Thursday that if the results are verified, this newly discovered throng of stars would beat the most distant galaxy identified by the Hubble Space Telescope, a record-holder that formed 400 million years after the universe began. “Everything we see is new. Webb is showing us that there's a very rich universe beyond what we imagined,” said Tommaso Treu of the University of California at Los Angeles, principal investigator on one of the Webb programs. “Once again the universe has surprised us. These early galaxies are very unusual in many ways.” Launched last December as a...

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NASA’s Webb catches fiery hourglass as new star forms

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November 17, 2022764 Views

Webb’s NIRCam Instrument Shows the Beginning of Protostar Evolution NASA’s James Webb Space Telescope has revealed the once-hidden features of the protostar within the dark cloud L1527, providing insight into the beginnings of a new star. These blazing clouds within the Taurus star-forming region are only visible in infrared light, making it an ideal target for Webb's Near-Infrared Camera (NIRCam). The protostar within the dark cloud L1527, shown in this image from NASA’s James Webb Space Telescope, is embedded within a cloud of material feeding its growth. Ejections from the star have cleared out cavities above and below it, whose boundaries glow orange and blue in this infrared view. The upper central region displays bubble-like shapes due to stellar “burps,” or sporadic ejections...

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NASA’s next-generation Artemis rocket lifts off on test flight to moon

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November 16, 2022169 Views

NASA's towering next-generation moon rocket blasted off from Florida early on Wednesday on its debut flight, a crewless voyage inaugurating the U.S. space agency's Artemis exploration program 50 years after the final Apollo moon mission. The 32-story Space Launch System (SLS) rocket surged off the launch pad from the Kennedy Space Center in Cape Canaveral at 1:47 a.m. EST (0647 GMT), to send its Orion capsule on a three-week test journey around the moon and back without astronauts aboard. About 90 minutes after launch, the rocket's upper stage fired thrusters for a "trans-lunar injection" burn propelling Orion out of Earth orbit on course for the moon. That put the capsule on track for a 25-day flight that will bring it to within 60 miles (97 km) of the lunar surface before sailing ...

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ESO images a wondrous star factory

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November 11, 2022631 Views

For the past 60 years the European Southern Observatory (ESO) has been enabling scientists worldwide to discover the secrets of the Universe. It mark this milestone by bringing a spectacular new image of a star factory, the Cone Nebula, taken with ESO’s Very Large Telescope (VLT). On 5 October 1962 five countries signed the convention to create ESO. Now, six decades later and supported by 16 Member States and strategic partners, ESO brings together scientists and engineers from across the globe to develop and operate advanced ground-based observatories in Chile that enable breakthrough astronomical discoveries. On the occasion of ESO’s 60th anniversary it is releasing this remarkable new image of the Cone Nebula, captured earlier this year with one of ESO’s telescopes and sel...

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Closest known black hole to Earth spotted by astronomers

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November 5, 2022198 Views

Astronomers have discovered the closest known black hole to Earth, just 1,600 light-years away. Scientists reported Friday that this black hole is 10 times more massive than our sun. And it’s three times closer than the previous record-holder. It was identified by observing the motion of its companion star, which orbits the black hole at about the same distance as Earth orbits the sun. The black hole was initially identified using the European Space Agency’s Gaia spacecraft, said Kareem El-Badry of the Harvard-Smithsonian Center for Astrophysics. Astronomers using the International Gemini Observatory, operated by NSF’s NOIRLab, have discovered the closest-known black hole to Earth. Credit: International Gemini Observatory/NOIRLab/NSF/AURA/J. da Silva/Spaceengine/M. Zamani El-Badr...

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ESO captures the ghost of a giant star

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November 1, 2022150 Views

Eerie image shows spectacular aftermath of a large star's death The aftermath of a large star's explosive death is seen in an image released on Monday by the European Southern Observatory, showing immense filaments of brightly shining gas that was blasted into space during the supernova. Before exploding at the end of its life cycle, the star is believed to have had a mass at least eight times greater than our sun. It was located in our Milky Way galaxy about 800 light years from Earth in the direction of the constellation Vela. A light year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km). This image shows a view of the orange and pink clouds that make up what remains after the explosive death of a massive star - the Vela supernova remnant. This imag...