Researchers at the University of Warwick in the United Kingdom used Chile’s Next Generation Transit Survey (NGTS) telescope to rediscover the planet named NGTS-11b. The planet was originally discovered in 2018 using data from the NASA TESS telescope, which scanned the inclination of light emitted by the star to identify it as a planet. At that time, the star could not be identified because the TESS telescope’s scan was limited to 27 days. However, using the NGTS telescope, researchers successfully rediscovered NGTS-11b, which revolves around its star every 35 days.
According to a report published on the Warwick website, a team of researchers led by Dr. Samuel Gill used past data from the NASA TESS telescope. The telescope uses the transition method to find planets by scanning the inclination of light from the star, which indicates that the object has passed between the telescope and the star. It takes two dives to confirm the existence of the planet, but since the TESS telescope only scanned the sky in most areas for 27 days, researchers could only detect one dive of NGTS-11b during this period of 2018.
Now, the team has observed the star using the Chilean NGTS telescope and conducted 79 night observations. This is the second subduction they noticed 35 days later, effectively identifying NGTS-11b as an exoplanet. “By chasing the second transport, we discovered a longer-period planet. This is the first discovery that is expected to push this type of discovery to a longer period.” Dr. Gill said. These discoveries are rare, but important because they allow us to find planets that are longer than those discovered by other astronomers. Planets with longer periods are cooler and more like planets in our solar system. “
The temperature of the rediscovered planet is 160 degrees Celsius, which is lower than that of Mercury and Venus. However, this is still not suitable for living. Nevertheless, compared to many other planets previously discovered, it is still close to the Goldilocks zone (the orbital range of a planet or moon that can support liquid water). NGTS-11b has the size and mass of Saturn and orbits a distance of 620 light years. Its distance from the sun is five times the distance between the sun and the earth.
Dr. Gill said that TESS has detected hundreds of single transits, and the team will now use this method for surveillance, allowing them to discover cooler exoplanets of all sizes.
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