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Astronomers discovered over 100 small planets in Solar system

Astronomers at the University of Pennsylvania discovered in the solar system more than 100 new small planets under the Dark Energy Survey project to map major structures in the universe and study dark energy, reported Sayons Alert and BTA.
At a distance of 5 years, from August 2013 to January 2019, specialists collected data on sources of infrared radiation in the sky from the southern hemisphere of our planet, including supernovae and galaxy clusters. High precision and great field vision proved beneficial in registering transneptune objects - celestial bodies in the solar system that hover beyond Neptune's orbit.

7 billion points were analyzed, which stand out against the noise background in the data, to be verified as candidates for transneptune sites.

Scientists excluded those objects that do not move, i.e. it is impossible to be small planets. There were 400 candidates on the preliminary list. After reanalysis, 316 small planets were identified, 139 of which by then were unknown.

Almost all these planets are located at a distance of 30-90 astronomical units, and 7 of them - at a distance of 150 astronomical units (1 astronomical unit equals the average distance between the Sun and Earth).

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