G-Dwarf is one of these outside planets, HD 20794D, which is likely to be a rocky planet where the parent’s star can live. HD 20794。
This image shows a resident zone around HD 20794 (green) and three planets in the system. Image credit: Gabrielpérezdíaz / smm / IAC.
“HD 20794 is not a normal star in HD 20794D,” said UNIGE ASTRONOMER XAVIER DUMUSQUE.
“Due to its lightness and proximity, it becomes an ideal candidate for the future telescope, and its mission is to directly observe the atmosphere of the outside planet.”
The HD 20794 is a bright G6V star in 6.04 % (19.7 light year) on the constellation of Ellidanus.
Stars, also known as LHS 19 or ERI, host at least three large -scale outside planets: HD 20794B, C, and D.
They have a track period of 18.3, 89.7, and 647.6 days, along with 2.2, 3, and 5.8 global quality.
“The interest of Super Earth Planet The HD 20794D is located in a zone where the stars can live and the place where liquid water can exist.
“Instead of tracing a relatively circular orbit like the Earth or Mars, the HD 20794D trains an elliptical trajectory with a large change in the distance to the star during the revolution.”
“Therefore, the planet vibrates between the inner ends of the star -free zone (0.75 au) and the track (2 au).”
“If there is water in the HD 20794D, it will promote the appearance of life from ice state to liquid state during the Earth revolution around the stars.”
Astronomer monitored the HD 20794 system with the ESO’s very large telescope (VLT) in the paranal of Chile, the Echelle branch device of the rocky planet and the stable spectrum observation (espresso) device.
They participated in espresso data along with the data of the high -precision radial speed planetary searcher (HARPS) device installed in the 3.6 -meter telescope of Chile, including archive data and new measurements from recent archives and new measurements.
“The HD 20794 system is a high -priority target for future air characteristics evaluation with direct imaging facilities,” said researchers.
Their paper Published in the journal Astronomy and astronomical physics。
______
N. Nari et al。 2025. Review of nearby star HD 20794 multi -planet system A & A 693, A297; DOI: 10.1051/0004-6361/202451769
Source: www.sci.news
