While scientists believe rogue planets are common throughout the universe, they're very hard to find. The answer to this question was given by the Kepler space telescope, one of the greatest assistants of researchers in the planet-exploration journey.
"Knowing how common different kinds of planets are is extremely valuable for the design of upcoming exoplanet-finding missions", said co-author Michelle Kunimoto, one of the researchers who recently joined the Transiting Exoplanet Survey Satellite, or TESS, team at the Massachusetts Institute of Technology in Cambridge, Massachusetts. It is slightly smaller than Earth and is floating in the Milky Way.
The technique used to discover the rogue planet was "gravitational microlensing". "The chances of seeing microlensing are slim because the three objects - the source, the lens and the observer - must be nearly completely identical".
The researchers described in a statement that this phenomenon "acts like a giant magnifying glass", making it easier to observe distant objects.
They used the 1.3-meter Warsaw Telescope at the Las Campanas Observatory in Chile to gather data.
These were the details of the news. Based on the incident, astronomers estimated that the planet had a mass similar to Mars and found it to be rogue.
It's also worth noting that the original news has been posted and is available at saudi24news. Time taken by events depends on the lensing object's mass-the less massive the lens, the shorter the microlensing event. The data also showed no light sources within eight astronomical units of the lensing event.
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Scientists have discovered in the Milky Way an Earth-sized free-floating rogue planet which does not orbit any star. In one New study, The same astronomers have found the smallest such planet ever.
"Our discovery demonstrates that low-mass free-floating planets can be detected and characterized using ground-based telescopes", the study's co-author, Prof. By studying the size distribution of rogue planets, scientists expect to gain a better understanding of the formation and evolution of planets.
The discovery of the "shortest-timescale microlensing event ever found", designated OGLE-2016-BLG-1928 and which has the timescale of 42 minutes, was reported by scientists on 29 October.
Are there other rogue planets? While most events caused by stars are over the past several days, the smaller planets offer only a few hour window.
"Although the mass of the lens can not be unambiguously measured, properties of the event are consistent with the lens being a sub-Earth-mass object with no stellar companion up to the projected distance of 8 AU (astronomical units) from the planet".
The Roman Telescope will help researchers determine how these planets form by providing information about how many there are as well as their masses - which could help indicate their origin stories. Other information, such as its chemical composition or temperature, can not be known at this time owing to astronomical limitations.