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Recent Articles
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Topic: Constellation Hydra
The new worlds orbit a star named GJ 357, an M-type dwarf about one-third the Sun’s mass and size and about 40% cooler that our star. The system is located 31 light-years away in the constellation Hydra. In February, TESS cameras caught the star dimming slightly every 3.9 days, revealing the presence of a transiting exoplanet — a world beyond our solar system — that passes across the face of its star during every orbit and briefly dims the star’s light. ![]() This diagram shows the layout of the GJ 357 system. Planet d orbits within the star’s so-called habitable zone, the orbital region where liquid water can exist on a rocky planet’s surface. If it has a dense atmosphere, which will take future studies to determine, GJ 357 d could be warm enough to permit the presence of liquid water. (NASA’s Goddard Space Flight Center/Chris Smith) «Read the rest of this article» Sections: Technology | No Comments
NASA detects Gravitational Waves from Two merging Neutron StarsNASA Headquarters
Shortly after 5:41am PDT (8:41am EDT) on August 17th, 2017, NASA’s Fermi Gamma-ray Space Telescope picked up a pulse of high-energy light from a powerful explosion, which was immediately reported to astronomers around the globe as a short gamma-ray burst. The scientists at the National Science Foundation’s Laser Interferometer Gravitational-wave Observatory (LIGO) detected gravitational waves dubbed GW170817 from a pair of smashing stars tied to the gamma-ray burst, encouraging astronomers to look for the aftermath of the explosion. ![]() An artist’s impression of gravitational waves generated by binary neutron stars. (R. Hurt/Caltech-JPL) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Hubble Space Telescope discovers shadow moving across Young StarWritten by Felicia Chou
The planet itself is not casting the shadow. But it is doing some heavy lifting by gravitationally pulling on material near the star and warping the inner part of the disk. The twisted, misaligned inner disk is casting its shadow across the surface of the outer disk. ![]() These images, taken a year apart by NASA’s Hubble Space Telescope, reveal a shadow moving counterclockwise around a gas-and-dust disk encircling the young star TW Hydrae. The two images at the top, taken by the Space Telescope Imaging Spectrograph, show an uneven brightness across the disk. Through enhanced image processing (images at bottom), the darkening becomes even more apparent. These enhanced images allowed astronomers to determine the reason for the changes in brightness. The dimmer areas of the disk, at top left, are caused by a shadow spreading across the outer disk. (NASA, ESA, and J. Debes (STScI)) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Spitzer Space Telescope takes ghostly images of three Nebulas for HalloweenWritten by Whitney Clavin
“Some might call the images haunting,” said Joseph Hora of the Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, principal investigator of the Spitzer observing program. “We look to the pictures for a sense of the history of the stars’ mass loss, and to learn how they evolved over time.” ![]() This trio of ghostly images from NASA’s Spitzer Space Telescope shows the disembodied remains of dying stars called planetary nebulas. Exposed Cranium Nebula (left) | Ghost of Jupiter Nebula (middle) | Little Dumbbell Nebula (right) (NASA/JPL-Caltech/Harvard-Smithsonian CfA) «Read the rest of this article» Sections: Technology | No Comments
NASA Hubble Space Telescope takes image of Colliding Galaxies
This interacting galaxy duo is collectively called Arp 142. The pair contains the disturbed, star-forming spiral galaxy NGC 2936, along with its elliptical companion, NGC 2937 at lower left. «Read the rest of this article» Sections: Technology | No Comments
NASA’s Hubble Space Telescope spies Spiral Galaxy near the Constellation of HydraNASA’s Goddard Space Flight Center
The galaxy is viewed from an angle, allowing Hubble to reveal its spiral nature clearly. The faint, loose spiral arms can be distinguished as bluish features swirling around the galaxy’s nucleus. This blue tinge emanates from the hot, young stars located in the spiral arms. The arms of a spiral galaxy have large amounts of gas and dust, and are often areas where new stars are constantly forming. «Read the rest of this article» Sections: News | No Comments
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