News tagged with sun

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Transiting exoplanet with longest known year

Astronomers have discovered a transiting exoplanet with the longest known year. Kepler-421b circles its star once every 704 days. In comparison, Mars orbits our Sun once every 780 days. Most of the 1,800-plus ...

Jul 21, 2014
4.8 / 5 (11) 1

Hot explosions on the cool sun

(Phys.org) —The Sun is more spirited than previously thought. Apart from the solar eruptions, huge bursts of particles and radiation from the outer atmosphere of our star, also the cooler layer right below ...

Oct 20, 2014
4.3 / 5 (12) 4

Dating our galaxy's dormant volcano

(Phys.org) —A dormant volcano—a supermassive black hole—lies at the heart of our galaxy. Fresh evidence suggests that it last erupted two million years ago.

Sep 23, 2013
4.7 / 5 (24) 5 | with audio podcast

Rotation of planets influences habitability

There are currently almost 2,000 extrasolar planets known to us, but most are inhospitable gas giants. Thanks to NASA's Kepler mission, a handful of smaller, rockier planets have been discovered within the ...

Aug 08, 2014
4.9 / 5 (21) 14

Tiny "nanoflares" might heat the Sun's corona

Why is the Sun's million-degree corona, or outermost atmosphere, so much hotter than the Sun's surface? This question has baffled astronomers for decades. Today, a team led by Paola Testa of the Harvard-Smithsonian ...

Oct 16, 2014
4.9 / 5 (10) 55

Sun sizzles in high-energy X-rays

For the first time, a mission designed to set its eyes on black holes and other objects far from our solar system has turned its gaze back closer to home, capturing images of our sun. NASA's Nuclear Spectroscopic ...

Dec 23, 2014
5 / 5 (9) 0