Archive for the ‘Progress in Space’ Category

An Earth-Sized Planet in the Habitable Zone of a Cool Star

April 19, 2014 Leave a comment

Quintana et al., Science (2014)

Categories: Progress in Space

Habitable-zone super-Earth candidate in a six-planet system

November 9, 2012 Leave a comment

Habitable-zone super-Earth ONLY 42 lightyears away!

Categories: Progress in Space

New class of planets – GJ 1214 b

February 26, 2012 Leave a comment

The definition of planets has to be extended due to a press release from Harvard-Smithonian center of astrophysics. In short: There are three different types of planets: rocky, terrestrial worlds (Mercury, Venus, Earth, and Mars), gas giants (Jupiter and Saturn), and ice giants. A recent measurement requires to add water planets to our definition since it has been shown that GJ 1214 b consists of more than 50 % water and has a dense atmosphere.

Categories: Progress in Space

First two-dimensional map of an exoplanet

February 10, 2012 Leave a comment

Astronomers around Carl Majeau, Seattle, managed to get a two-dimensional image of an exoplanet. It’s an intensity map that has been calculated from measurements of its brightness. The technique they used is called eclipse mapping. In short: if a celestial body is passing behind another one, it is possible to extract information about its surface temperature. The white color marks a hot spot and one can clearly recognize its day side.

Molleweide projection of the 2D infrared map of HD189733b. Source: Original paper

Categories: Progress in Space

GJ667Cc – earth 2.0?

February 4, 2012 Leave a comment

A team of astonomers under direction of Guillem Anglada-Escudé has reported a new exoplanet called GJ667Cc. It circles a red dwarf with a period of 28.15 days and a minimum mass of 4.5 times the mass of earth. It lies in the habitable zone and is therefore a good candidate to support life. Its distance from earth is 22 lightyears.

Source: Original paper

Two earth sized planets orbiting Kepler-20 have been found

December 22, 2011 Leave a comment
Categories: Progress in Space