Nasa spacecraft spots gaseous planet three times the size of Earth

Tess mission has detected three new planets and six supernovae in its first three months

Three new planets and 6 supernovae outside our system are discovered by Nasa’s planet-hunting Tess mission in its 1st 3 months.

Since it started measure the sky in Gregorian calendar month, the MIT-led Transiting Exoplanet Survey Satellite project has known Pi Mensae c, a “super-Earth” that travels around its star each six days, and LHS 3844b, a rocky world with associate orbit of solely eleven hours.

The most recent exoplanet discovery, named HD 21749b, has the longest orbital amount at thirty six days. It orbits a bright, close dwarf star regarding fifty three lightweight years away within the Reticulum constellation, and is believed to own a surface temperature of regarding 150C (300F). this is often comparatively cool considering its proximity to its star.

Diana Dragomir, a Edwin Powell Hubble fellow at MIT’s Kavli Institute for astronomy and house analysis World Health Organization light-emitting diode the invention team, said: “It’s the best planet we all know of around a star this bright. It’s terribly arduous to search out little planets that orbit farther from their stars, and are so cooler. however here we have a tendency to were lucky, and might currently study this one in additional detail.”

The new planet is regarding 3 times the scale and twenty three times as large as Earth, which means it’s seemingly to be gaseous instead of rocky, and it’s an environment a lot of dense than Neptune or Uranus. Its discovery was declared by scientists at the annual yankee Astronomical Society meeting in urban center.

The researchers have conjointly detected proof of another planet that, if confirmed, may well be the primary Earth-sized discovery by Tess.
Johanna Teske, a Edwin Powell Hubble fellow and author of the report, said: “I’m terribly interested to grasp whether or not [it] has associate Earth-like density to match its Earth-like radius – this can contribute to our understanding whether or not Earth-sized planets have numerous compositions or are all roughly kind of like Earth.”

Tess monitors sections of the sky and waits for short dips within the lightweight of regarding two hundred,000 close stars, seemingly to be an indication that a planet has passed before of that star.

Tess has conjointly detected dozens of transient events, together with pictures of six supernovae in distant galaxies that were later seen by ground-based telescopes.

George Ricker, the mission’s scientist at university, foretold any discoveries: “We’re solely halfway through Tess’s 1st year of operations and also the knowledge floodgates are simply starting to open.”

this text was amended on nine Gregorian calendar month 2018 to correct errors introduced within the redaction process: HD 21749b is twenty three times the mass, not the scale, of Earth, and its surface temperature is regarding 150C, not 1,650C.


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