A pair of gas giant exoplanets have been discovered orbiting a distant sun-like star with help from civilian scientists around the world.
Members of NASA-funded Planet Hunters Transiting satellite for exoplanet research (TESS) project discovered two planets around the distant star HD 152843, which is located about 352 light years from Earth. According to NASA, the star has a mass similar to that of the Sun, but is almost 1.5 times larger and slightly brighter.
The inner planet, dubbed HD 152843b, is about 3.4 times the size of Earth, or about the size of Neptune, and orbits its star in about 12 days. The outer planet, dubbed HD 152843c, is about 5.8 times the size of Earth and 27.5 times more massive. making him sub-Saturn, or a planet the size between Neptune and Saturn. Its orbital period is 19 to 35 days, according to new research.
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“Studying them together, both of them at the same time, is really interesting to limit theories about how planets form and evolve over time,” said Nora Eisner, lead author of the study and doctoral student in astrophysics at the University of Oxford. United Kingdom, NASA said in a statement…
Civil Scientists with Planet Hunters TESS Project, which is operated via the Zooniverse website, has detected three different transit events – a brief drop in the brightness of a star as the planet crosses its face, blocking some of its light – in one month of observations with HD 152843.
Their findings were then corroborated by professional astronomers who compared the data to computer models that suggest that two transit events originated from an inner planet (HD 152843b) and a third transit occurred from a second, outer planet (HD 152843c), according to the statement.
Astronomers also used two additional instruments – a high-precision radial velocity finder for the northern hemisphere at Telescopio Nazionale Galileo in Spain and an ultra-precise spectrometer at Lowell Observatory in Arizona – to confirm that transit events were indeed caused by exoplanets and not by other sources such as another stellar satellite. , passing asteroids or the movements of TESS itself. These tools use a method called radial velocity to detect the tiny “wobbles” that an orbiting planet causes its parent star to move towards or away from Earth.
Observations of the HD 152843 system show that exoplanets are too hot and gaseous to keep life as we know it on the ground. However, according to the statement, studying two new exoplanets is helping scientists learn about the range of possible planets in our galaxy.
“We are taking small steps towards the search Terrestrial planet and study its atmosphere and continue to push the boundaries of what we can see, ”Eisner said in a statement.
Civil science projects such as the Planet Hunters TESS project have helped uncover many candidates for exoplanets that might otherwise go unnoticed. The civilian scientists who helped identify HD 152843b and HD 152843c were cited as co-authors of a new study that was published on June 8 in the Monthly Notices of the Royal Astronomical Society.
“I feel like I’m participating, even if it’s just a small part,” Cesar Rubio, a civilian scientist and machinist from California, said in a statement. “Especially scientific research; it suits me. “
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