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Teaser 1512382721

Traces of life on nearest exoplanets may be hidden in equatorial trap, study finds

November 29, 2017
Simulations show that the search for life on other planets may well be more difficult than previously assumed: On planets like Proxima b or TRAPPIST-1d, unusual flow pattern could hide atmospheric ozone from telescopic observations. Ozone, which is a variety of oxygen, is seen as one of the possible traces allowing for the detection of life on another planet from afar.  The simulations, led by Ludmila Carone of the Max Planck Institute for Astronomy, have consequences for formulating the optimal strategy for searching for (oxygen-producing) life such as bacteria or plants on exoplanets. [more]
Teaser 1507206533

Astronomers discover unusual spindle-like galaxies  

October 12, 2017
Galaxies are majestic, rotating wheels of stars? Not in the case of the spindle-like galaxies studied by Athanasia Tsatsi (Max Planck Institute for Astronomy) and her colleagues. Using the CALIFA survey, the astronomers found that these slender galaxies, which rotate along their longest axis, are much more common than previously thought. The new data allowed the astronomers to create a model for how these unusual galaxies probably formed, namely out of a special kind of merger of two spiral galaxies. The results have been published in the journal Astronomy & Astrophysics. [more]
Teaser 1506496706

Bringing the building blocks of life down to Earth, from space

October 02, 2017
Astronomers from McMaster University and the Max Planck Institute for Astronomy have completed calculations that lead to a consistent scenario for the emergence of life on Earth, based on astronomical, geological, chemical and biological models. In this scenario, life forms a mere few hundred million years after Earth’s surface was cool enough for liquid water; the essential building blocks for life were formed in space during the formation of the solar system, and delivered to warm little ponds on Earth by meteorites. The new results have been published in the Proceedings of the US National Academy of Sciences. [more]
Teaser 1503584939

Heavy stellar traffic, deflected comets, and a closer look at the triggers of cosmic disaster

August 31, 2017
As stars pass close by our solar system, they can nudge comets from the distant Oort cloud into the inner regions around the Sun. Thus, stellar encounters are an important factor in determining the risk of large cosmic impacts on Earth. Now, Coryn Bailer-Jones from the Max Planck Institute for Astronomy has used data from the ESA satellite Gaia to give the first systematic estimate of the rate of such close stellar encounters. Every million years, up to two dozen stars pass within a few light-years of the Sun, making for a near-constant state of perturbation. The results have been published in the journal Astronomy & Astrophysics. [more]
Teaser 1503585047

Odd planetary system around fast-spinning star doesn't quite fit existing models of planet formation

July 06, 2017
Astronomers have discovered a rare, warm, massive Jupiter-like planet orbiting a star that is rotating extremely quickly. The discovery raises puzzling questions about planet formation – neither the planet's comparatively small mass nor its large distance from its host star are expected according to current models. The observations that led to the discovery were made using the SPHERE instrument at ESO's very large telescope. The article describing the results has been accepted for publication in the journal Astronomy & Astrophysics. [more]
 
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