Astronomey dating planets
Travelling at 20% of the speed of light, they would take about 20 years to cover the 1.3 parsecs from Earth to Proxima Centauri.
Leo takes its rightful place as the lord of the skies on March nights.
“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.
The planet is known as HD 131399Ab and appears at the lower-left of the picture.
Located about 320 light-years from Earth in the constellation of Centaurus, HD 131399Ab is about 16 million years old, making it also one of the youngest exoplanets discovered to date, and one of very few directly-imaged planets. saga, was a strange world with its two suns in the sky, imagine this: a planet where you’d either experience constant daylight or enjoy triple sunrises and sunsets each day, depending on the seasons, which happen to last longer than human lifetimes.
It stands to the upper left of the Big Dipper as night falls, and is visible through a small telescope. Get both together for just , a savings of 20% over purchasing both separately.
“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.
Look for it clearing the northeastern horizon in late evening.
This artist’s impression shows a view of the triple star system HD 131399 from close to the giant planet orbiting in the system.
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.