Stellar black holes
© Afrim Constantin –
GRO J0422 +32 is an X-ray nova that is part of a binary star system in which one of the components is a massive black hole between 3.66 and 4.97 solar masses. The secondary star is a red dwarf star of spectral class M1V apparent magnitude 13.2 and 0.116 mass times that of the Sun
Another two white-dwarfs in Universe
© Afrim Constantin –
Thanks to the Hubble Space Telescope, a team of astronomers found chemical signatures of debris of rocky planets around two white dwarfs, one constellation not far from us. So far it has been very difficult to observe planets within the clusters, but the same method could allow us to discover many more. An Earth-like planet
What happens to Kepler?
© Afrim Constantin –
Serious problems with the satellite tracking system dedicated to the hunt for extrasolar planets seem to put an end to the mission. On the type of fault and the relevant scientific contribution provided by Kepler in recent years we have heard Enrico Flamini (ASI) and respectively, Raffaele Gratton (INAF). Those gyroscopes! It may have been
How much water around DG Tau!
© Afrim Constantin –
Thanks to the observations of the space telescope Herschel ESA a large amount of water vapor had been discovered in the disc around a young star from which it formed a planetary system similar to ours; a result of fundamental importance because it could explain the origin of life and water on Earth. The discovery
Thus a planet was born
© Afrim Constantin –
Still surprised by the planetary system HR 8799? A study, published in Science, reconstructs the stages of formation of one of the four worlds that populate it. All thanks to high-resolution spectral analysis of its atmosphere. There is an unusual ferment around the star HR 8799. Just recently, researchers became aware of an unusual chemical composition
Hot ice in UNIVERSE
© Afrim Constantin –
Exactly the opposite of what common sense might suggest the best chances of find Earth-like planets with life and maybe there would be peering around the cooler stars. These are the results of a study published on Astrobiology. Notice to hunters of extra solar planets: if you are looking to find new worlds where life
The smallest exoplanet ever photographed
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Among the few extrasolar planets directly observed, researchers immortalized with the help of the Japanese Subaru telescope a planet which has less mass, perhaps as little as three times that the mass of Jupiter. GJ 504 b, this is its name, orbits at 60 light years away around a star similar to the Sun. Source:
Identikit of planetary systems
© Afrim Constantin –
The first two results had been published on A & A of the project GAPS – Global Architecture of Planetary Systems. Highly accurate measurements of the spectrometer HARPS -N, installed at the Galileo National Telescope, are helping astrophysicists to define with greater precision, important features of the hundreds, perhaps thousands, of planetary systems in our
Poised between stars and planets
© Afrim Constantin –
Two bodies difficult to categorize have been discovered: solitary giant planets or brown dwarfs extremely low mass? Both formed very recent – 12 million years ago, the other just 2 million years ago – and they are respectively 80 and 500 light-years from us. Studies out of ApJ and A & A. Source: www.nasa.gov One
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