gravity

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Brittle bones in space

There’s a similarity between astronauts up long in space and older men and especially women: osteoporosis, human bones losing their density. ISS inhabitants lost on average 11% of hip bone mass during their stay in…


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Rosetta’s Mars flyby successfull

The Mars flyby of Rosetta went well. During the process, it took some pictures. An intriguing one shows a picture of Mars from approximately 1000 km height, with parts of the spacecraft in view:  …



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Jupiter in the picture again

The New Horizons spacecraft is closing in on Jupiter to get a gravity assist for its travel to Pluto. Here’s a picture of Jupiter from the NH spacecraft. "Mission scientists also will use this flyby…


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Hobbits in Space

Everything in the universe comes in formats small, intermediate and large. Even galaxies. Quite recent discoveries are hobbit galaxies.One of them is only 1200 ligthyears across, yet is still producing new young stars. An intriguing…