Beyond Earthly Skies

Tuesday, September 30, 2014

Hot Giant Planet that is Blacker than Coal

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Gandolfi et al. (2014) report on the discovery of a half-Jupiter mass planet transiting an old Sun-like star every 2.7 days. This discovery...
Monday, September 29, 2014

A Highly Eccentric Brown Dwarf around a Giant Star

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To date, ~10 brown dwarfs are known around giant stars (i.e. evolved stars). Brown dwarf are objects more massive than planets, but are not...
Wednesday, August 27, 2014

A Uranus-Type Planet in a Binary Stellar System

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A gravitational microlensing search by R. Poleski (2014) revealed the presence of a Uranus-type planet in orbit around a 0.6 solar mass sta...
Friday, August 15, 2014

Astrospheres of Evolving Massive Stars

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O-type stars are amongst the most massive and most luminous stars. Isolated O-type stars that move independently through the interstellar m...
Thursday, August 14, 2014

A Companion Planet Keeps an Alien Earth Habitable

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On Earth, the presence of tectonic activity maintains the carbon cycle and acts as a thermostat, moderating the greenhouse effect. Earth-si...
Wednesday, August 13, 2014

Occurrence of Terrestrial Planets around Cool Stars

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The ever growing number of detected exoplanets shows that small planets are far more common than larger ones. A study by Morton & Swift...
Tuesday, August 12, 2014

Rapidly Spinning Asteroids

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Asteroids range in size from a few meters to a few hundred kilometres. Observations indicate that asteroids larger than 150 m have rotation...
Monday, August 11, 2014

White Dwarf Shreds Planet in a Burst of X-Rays

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The globular cluster NGC 6388 is believed to harbour an intermediate mass black hole (IMBH) with ~1000 times the Sun’s mass at its centre. O...
Sunday, August 10, 2014

Swarm of Planets Circling a Supermassive Black Hole

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A supermassive black hole (SMBH) with ~4 million times the Sun’s mass sits in the centre of the Milky Way. Over the decades, observations h...
Saturday, August 9, 2014

Hypervelocity Planets

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At the centre of the Milky Way sits a supermassive black hole (SMBH) with a mass of around 4 million times the mass of the Sun. A close enco...
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