There is a particular system 1,600 light - years from our solar system . It is compose of twobrown dwarfs , monolithic objects too big to be satellite and too modest to conflate H and become stars . But that is not the unknown part : scientist have now let out a Venus - sized planet around the diminished brown gnome .
A rocky satellite orbit a brown midget has never been observed before . This organisation is therefore thought to be either a scale - up interlingual rendition of a moon blend around a planet or a scaled - down version of a planet going around a hotshot . The ratio between the plenty of the host brownish midget and that of the planet is the same as the proportion between the Sun and Uranus and between Jupiter and Callisto ( its second largest moon ) . The astronomers argue that this suggests the same mechanism form Uranus , Callisto and the new major planet .
Planets and moons mold from an accumulation disk , a rotating ring - comparable anatomical structure surround a larger gravitational body made of detritus and gas . Over clip , these material coalesce into large aim that we recognize as planet and lunar month . The latest discovery indicates that the constitution of objects from accretion disks are standardized for major planet , brownish dwarf and stars .
OGLE-2013 - BLG-0723B , the name of the object in question , orbit its host in about 400 day and at a aloofness of 50 million km ( 31 million miles ) . It is 30 per centum less massive than the Earth and only slightly less monolithic than Venus . The discovery and its importance were bring out in a newspaper in theAstrophysical Journal .
The discovery was potential thanks to a proficiency calledmicrolensing . If two massive physical object – in this case a brownish nanus and a hotshot – align from our perspective in the sky , the gravity of thebrown dwarf act like a crystalline lens and magnifies the light we receive from the more distant star . From our point of view , the champion gets brighter and brighter , extend to a maximum when both object are perfectly align and then becoming progressively dimmer until it come back to its original luminosity .
When a planet orbits the brown dwarf , there are jumps in the brightness level of the star , suddenly becoming lustrous than expect . Most exoplanets are discovered because they make pass in front of their stars and we can see a midget eclipse ; this technique does n’t work well for brown nanus , though , because they do n’t emit enough seeable light . Microlensing , therefore , is the only fashion to discover rocky major planet orbit brownish dwarfs .
