Astrophysical Journal

Was Kepler's supernova unusually powerful?

(Phys.org)—In 1604, a new star appeared in the night sky that was much brighter than Jupiter and dimmed over several weeks. This event was witnessed by sky watchers including the famous astronomer Johannes ...

Sep 11, 2012
4.9 / 5 (9) 0 | with audio podcast

Odd planet, so far from its star

A gas giant has been added to the short list of exoplanets discovered through direct imaging. It is located around GU Psc, a star three times less massive than the Sun and located in the constellation Pisces. ...

May 13, 2014
4.4 / 5 (10) 0

New insights on how spiral galaxies get their arms

(Phys.org) —Spiral galaxies are some of the most beautiful and photogenic residents of the universe. Our own Milky Way is a spiral. Our solar system and Earth reside somewhere near one of its filamentous ...

Apr 02, 2013
4.3 / 5 (10) 52 | with audio podcast

Capturing a fleeting starburst

On 11 November 2011, astronomers witnessed a distant star erupt in an incredibly powerful explosion. An international research team including Mikio Morii and colleagues from the MAXI Team at the RIKEN Global ...

Jan 31, 2014
4.8 / 5 (9) 3

Spectacular supernova's mysteries revealed

(Phys.org) —New research by a team of UK and European-based astronomers is helping to solve the mystery of what caused a spectacular supernova in a galaxy 11 million light years away, seen earlier this ...

Aug 22, 2014
4.3 / 5 (10) 3

Infant solar system shows signs of windy weather

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have observed what may be the first-ever signs of windy weather around a T Tauri star, an infant analog of our own Sun. This may help ...

Sep 22, 2014
4.8 / 5 (9) 1

Massive stellar winds are made of tiny pieces

(Phys.org)—ESA's XMM-Newton space observatory has completed the most detailed study ever of the fierce wind from a giant star, showing for the first time that it is not a uniform breeze but is fragmented ...

Feb 05, 2013
4.2 / 5 (10) 2 | with audio podcast

Galaxies fed by funnels of fuel

(Phys.org) —Computer simulations of galaxies growing over billions of years have revealed a likely scenario for how they feed: a cosmic version of swirly straws.

May 24, 2013
4.2 / 5 (10) 36 | with audio podcast

Black hole growth found to be out of sync

(Phys.org) -- New evidence from NASA's Chandra X-ray Observatory challenges prevailing ideas about how black holes grow in the centers of galaxies. Astronomers long have thought that a supermassive black hole ...

Jun 11, 2012
4.6 / 5 (9) 1 | with audio podcast