The Wonder of Science : 1600 light years


The image

Discovery of a solar system

 We have a moon and it circles is as we circle the sun so when little images detected by microscopic light changes observe something close (but literally 1600 light years away) our astrophysists get excited.

Here is their excitement

There is a peculiar system 1,600 light-years from our solar system. It is composed of two brown dwarfs, massive objects too big to be planets and too small to fuse hydrogen and become stars. But that is not the strange part: Scientists have now discovered a Venus-sized planet around the smaller brown dwarf. 
A rocky planet orbiting a brown dwarf has never been observed before. This system is therefore thought to be either a scaled-up version of a moon going around a planet or a scaled-down version of a planet going around a star. The ratio between the mass of the host brown dwarf and that of the planet is the same as the ratio between the Sun and Uranus and between Jupiter and Callisto (its second largest moon). The astronomers argue that this suggests the same mechanisms formed Uranus, Callisto and the new planet. 


Planets and moons form from an accretion disk, a rotating ring-like structure surrounding a larger gravitational body made of dust and gas. Over time, these materials coalesce into large objects that we recognize as planets and moons. The latest discovery indicates that the formation of objects from accretion disks are similar for planets, brown dwarfs and stars.
OGLE-2013-BLG-0723B, the name of the object in question, orbits its host in about 400 days and at a distance of 50 million kilometers (31 million miles). It is 30 percent less massive than the Earth and only slightly less massive than Venus. The discovery and its importance were published in a paper in the Astrophysical Journal.  


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Comment content!

The thing that finds things

Looking through powerful lenses can be done with computation taking up the visual perceptions beyond the human.  They spot the change of light when the two pass and apparently there are also two dwarfs to observe.

The spooky thing it apparently takes around 400 days to complete a circuit.

The whole formation of planets requires hydrogen to make one.

So out there even more stranger planets will exist.

A stranger being one you don’t know.

John Graham

17 November 2015



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