Apoorva Aditya

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Possible explanation for mysterious radio flashes

Mysterious bright radio flashes that appear for only a brief moment on the sky and do not repeat could be the final farewell of a massive star …

APOD: Globular Star Cluster NGC 6752 (2013 Jul 05) Image Credit & Copyright: Damian Peach http://apod.nasa.gov/apod/ap130705.html Explanation: Some 13,000 light-years away toward the southern constellation Pavo, the globular star cluster NGC 6752 roams the halo of our Milky Way galaxy. Over 10 billion years old, NGC 6752 follows clusters Omega Centauri and 47 Tucanae as the third brightest globular in planet Earth's night sky. It holds over 100 thousand stars in a sphere about 100 light-years in diameter. Telescopic explorations of the NGC 6752 have found that a remarkable fraction of the stars near the cluster's core, are multiple star systems. They also reveal the presence of blue straggle stars, stars which appear to be too young and massive to exist in a cluster whose stars are all expected to be at least twice as old as the Sun. The blue stragglers are thought to be formed by star mergers and collisions in the dense stellar environment at the cluster's core. This sharp color composite also features the cluster's ancient red giant stars in yellowish hues. http://www.damianpeach.com/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130705 #APOD

The best science and technology pictures of the week

This week's most stunning images in science and technology, including flying aces, challenging swims and confused robots.<p><b>More stunning image galleries:</b><p>Supermoon, Tesla coils and medical clowns<p>World’s biggest solar-powered boat and forest fires<p>Astronaut photography, a tiny helicopter and a hovering …

Space Wind Really Does Exist

We detect a plasmaspheric breeze.<p>More than 20 years ago, researchers proposed the existence of a space wind--a steady flow of charged particles--inside the Earth's magnetosphere, the region of space governed by our magnetic field. After years of theoretical work, Iannis Dandouras, an astrophysicist …

Update on sunspot group 11 times as wide as Earth

AR1785 and AR1787 comprise one of biggest sunspot groupings of Solar Cycle 24. So far, though, the grouping has been surprisingly quiet.<p>Two days ago, …

WIRED Space Photo of the Day 2013 | WIRED

Jan. 19, 2014: Solar X-Flare<p>The largest sunspot group of the solar cycle unleashed a large (X1.2 class) flare just when it was facing right towards …

Space weather forecast study turns table of effective predictions on its head

A comparison of solar flare forecasting systems has turned the performance table of apparently effective prediction methods on its head.<p>Researchers …

Starfish have eyes at the tips of their arms

A study has shown for the first time that starfish use primitive eyes at the tip of their arms to visually navigate their environment.<p>Research headed …

Landing on asteroids could cause a zero-gravity avalanche

Asteroids may not be as stable as scientists thought. A recent experiment shows that the force from a landing spacecraft might easily cause an avalanche or something resembling an extraterrestrial mudslide, as a result of shifts in the dust on the asteroid's granular surface.<p>Researchers compare the …

APOD: NGC 6384: Spiral Beyond the Stars (2013 Jul 06) Credit: ESA, Hubble, NASA http://apod.nasa.gov/apod/ap130706.html Explanation: The universe is filled with galaxies. But to see them astronomers must look out beyond the stars of our own galaxy, the Milky Way. This colorful Hubble Space Telescopic portrait features spiral galaxy NGC 6384, about 80 million light-years away in the direction of the constellation Ophiuchus. At that distance, NGC 6384 spans an estimated 150,000 light-years, while the Hubble close-up of the galaxy's central region is about 70,000 light-years wide. The sharp image shows details in the distant galaxy's blue star clusters and dust lanes along magnificent spiral arms, and a bright core dominated by yellowish starlight. Still, the individual stars seen in the picture are all in the relatively close foreground, well within our own galaxy. The brighter Milky Way stars show noticeable crosses, or diffraction spikes, caused by the telescope itself. http://www.spacetelescope.org/images/potw1108a/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130706 #APOD

A Submarine In Space And Other Amazing Images From This Week

Solar Impulse completes its solar-powered flight across the US

On Saturday evening the solar-powered aircraft Solar Impulse touched down safely at John F. Kennedy International Airport, completing its coast-to-coast journey across the domestic United States. The aircraft took off from Mountain View, California on May 3rd, piloted at the time by Bertrand …

APOD: NGC 2170: Still Life with Reflecting Dust (2013 Jul 07) Image Credit & Copyright: Adam Block, Mt. Lemmon SkyCenter, U. Arizona http://apod.nasa.gov/apod/ap130707.html Explanation: In this beautiful celestial still life composed with a cosmic brush, dusty nebula NGC 2170 shines at the upper left. Reflecting the light of nearby hot stars, NGC 2170 is joined by other bluish reflection nebulae, a compact red emission region, and streamers of obscuring dust against a backdrop of stars. Like the common household items still life painters often choose for their subjects, the clouds of gas, dust, and hot stars pictured here are also commonly found in this setting - a massive, star-forming molecular cloud in the constellation of the Unicorn (Monoceros). The giant molecular cloud, Mon R2, is impressively close, estimated to be only 2,400 light-years or so away. At that distance, this canvas would be about 15 light-years across. http://www.caelumobservatory.com/ http://skycenter.arizona.edu/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130707 #APOD