An exoplanet some 70% the mass of Jupiter and about 1.4 times its size has been discovered by astronomers at India’s Physical Research Laboratory (PRL). The behemoth is 752 light years away from Earth, and has an incredible orbit.
The new discovery was revealed by the Indian Space Research Organization on Tuesday in a statement saying the country’s PRL Advanced Radial-velocity Abu-sky Search (PARAS) had measured the movements of the newly-discovered exoplanet between December 2020 and March 2021.
The planet, named either HD 82139 or TOI 1789 depending on which cataloguing method is used, is ultra-hot – with a surface temperature up to 2,000 degrees Kelvin.
India’s PRL Advanced Radial-velocity Abu-sky Search (PARAS), an optical fiber-fed spectrograph, observed t he exoplanet and its movements from the Mt. Abu Observatory, according to the space agency. Not only is the planet ultra-hot, but it is also one of the closest to an orbiting star yet discovered.
The measurements obtained via PARAS were confirmed by Germany’s TCES spectrograph in April, and further verified by independent photometric observations from the PRL’s 43cm telescope, also located at Mt. Abu.
The exoplanet has an unusually quick orbit – a mere 3.2 days. The pace indicates that its distance from its host star is one-tenth the distance between Mercury and the Sun. This makes the exoplanet one of fewer than 10 such solar systems discovered thus far. Given the closeness to its host star – an aging orb 1.5 times the mass of the Sun – the new planet is also one of the lowest density planets yet discovered.
Planets so close to their host stars, with a distance less than 0.1 AU and masses between 0.25 to several times the mass of Jupiter, are known as “hot-Jupiters.”
The Indian space agency hailed the detection of the new planet as an opportunity to “enhance our understanding of various mechanisms responsible for inflation in hot-Jupiters and the formation and evolution of planetary systems around evolving and aging stars.” It is the second planet to be discovered by PARAS, with a previous discovery taking place in 2018.
A strike of more than 20,000 metal workers in Cadiz, Spain has halted the operations of key manufacturing plants, including Airbus and Alestis, with barricades erected, roads blocked, and vehicles burned.
Cadiz, the capital of the southernmost province of the country, has become one of the main sites of protests over working conditions. The Avenida de Astilleros is currently closed to traffic, with protesters burning vehicles.
Picket lines also blocked access to major shipbuilding and industrial sites of key local companies, such as Airbus, Navantia, Dragados, Alestis, and Acerinox, causing their work to be interrupted.
Protesters also cut off access to major industrial zones in Puerto Real and Campo de Gibraltar with barricades and bonfires. Rail traffic is also being obstructed, with pipes thrown onto the tracks.
The national police have been deployed to bring the situation under control and to protect the industrial sites. At one point on Tuesday, the strike turned into a full-scale confrontation, with protesters throwing rocks and screws at police, who reacted by firing rubber bullets. One person was arrested.
🎥🛑En #España 2º día y arden las calles de Cádiz en el segundo día de la #huelgadelmetal indefinida.
🔥🏴Todo nuestro apoyo a lxs trabajadorxs del sector del metal en #Cadiz.
The Federation of Metal Entrepreneurs (FEMCA), which represents major employers in the region, reiterated earlier its offer for dialogue with the workers, while stressing that the union’s requests were “unjustified” and “disproportionate.”
The workers say they will continue the strike until FEMCA provides them with an acceptable agreement.
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