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s are much fainter than the stars they orbit, extrasolar planets are extremely difficult to detect directly.
, fulfils a longstanding dream of science-fiction writers — a potentially habitable world that is close enough for humans to send their first interstellar spacecraft.
Argo, the ship of Jason and the Argonauts, sails across the south tonight.
It originally was a single constellation, but astronomers broke it into four smaller ones: Carina, the keel; Vela, the sail; Puppis, the poop deck; and Pyxis, the compass. After tonight, it will no longer be the “evening star.” Instead, it will be the “morning star,” as it crosses the line between Earth and the Sun.
The star that represents the head of Hercules rises below his body.
It is called Rasalgethi, and it actually consists of three individual stars.
“For about half of the planet’s orbit, which lasts 550 Earth-years, three stars are visible in the sky, the fainter two always much closer together, and changing in apparent separation from the brightest star throughout the year,” said Kevin Wagner, a first-year Ph D student in Apai’s research group and the paper’s first author, who discovered HD 131399Ab.
“For much of the planet’s year the stars appear close together, giving it a familiar night-side and day-side with a unique triple-sunset and sunrise each day.
With a temperature of 850 Kelvin (about 1,070 °F or 580 °C) and weighing in at an estimated four Jupiter masses, it is also one of the coldest and least massive directly imaged exoplanets.
“HD 131399Ab is one of the few exoplanets that have been directly imaged, and it’s the first one in such an interesting dynamical configuration,” said Daniel Apai, an assistant professor of astronomy and planetary sciences who leads a research group dedicated to finding and observing exoplanets at the UA.
This crossing is known as inferior conjunction, and it happens every 584 days. Perigee March 3, 30 Apogee March 18 The full Moon of March is known as the Sap Moon, Worm Moon, or Lenten Moon.Tags: Adult Dating, affair dating, sex dating