News tagged with stellar activity

Planet 'devoured in secret' by its own sun

(Phys.org)—A planet roughly 1.4 times the size of Jupiter is being consumed by its own star behind a shroud thanks to a magnesium veil absorbing all of certain light wavelengths, according to new observations ...

Nov 21, 2012
5 / 5 (6) 0

New planet discovered in Trinary star system

Until recently, astronomers were highly skeptical of whether or not planets should be possible in multiple star systems. It was expected that the constantly varying gravitational force would eventually tug ...

Jul 14, 2011
4.7 / 5 (24) 4 | with audio podcast

Pulverized planet dust might lie around double stars

(PhysOrg.com) -- Tight double-star systems might not be the best places for life to spring up, according to a new study using data from NASA's Spitzer Space Telescope. The infrared observatory spotted a surprisingly ...

Aug 23, 2010
4.4 / 5 (5) 1 | with audio podcast

How do supermassive black holes get so big?

(PhysOrg.com) -- At the center of most galaxies lie supermassive black holes that can grow to become more than a billion times larger than our Sun. However, astrophysicists don’t fully understand the formation ...

Apr 26, 2010 weblog
4.2 / 5 (12) 1 | with audio podcast

Maps Unveil the Source of Starburst Galaxy's Winds

(PhysOrg.com) -- A research group at Kyoto University has discovered that shocks are the primary energy sources that excite the galactic wind region of starburst galaxy NGC 253. Their images of the center ...

Nov 18, 2009
5 / 5 (8) 0

First Solid Evidence for a Rocky Exoplanet (w/ Video)

(PhysOrg.com) -- The longest set of HARPS measurements ever made has firmly established the nature of the smallest and fastest-orbiting exoplanet known, CoRoT-7b, revealing its mass as five times that of Earth's. ...

Sep 16, 2009
4.6 / 5 (14) 2