descoperirea, au ajutorul spectografului Harps, de la observatorul La Silla, din Chile, situat la inaltimea de 2.400 m deasupra nivelului marii, a unei super-Terre, aceasta fiind cea mai mica din cele 125 de planete cunoscute astazi in afara sistemului nostru solar.
Noua planeta, care nu are inca o denumire oficiala, a fost descoperita pe orbita stelei Arae, care, prin caracteristicile sale fizice, aminteste foarte mult de Soarele nostru. Arae se afla la o distanta de 50 de ani lumina fata de Pamant, in constelatia Altar, si este suficient de luminoasa pentru a fi zarita cu ochiul liber din emisfera sudica a Pamantului. Anterior, pe orbita stelei Arae fusese descoperita o planeta gigant, de dimensiunile lui Jupiter, care efectueaza o rotatie completa in jurul stelei de 650 de zile pamantene.
„Super-Terra”, a carei masa este de 14 ori mai mare decat cea a planetei noastre, are dimensiunile apropiate de cele ale lui Uranus, cel mai mic dintre „gigantii” sistemului nostru solar. Din fericire, ea nu este un gigant gazos, ci o planeta de roci dure, asemanatoare Pamantului, lui Marte, Venus, Jupiter sau Mercur si are o atmosfera gazoasa normala, a carei componenta este imposibil de determinat deocamdata, pentru aceasta fiind necesara o expeditie astrala fara precedent din punct de vedere al complexitatii si distantei. „Astfel de caracteristici fac sistemul planetar Arae foarte interesant pentru noi, considera astronomul francez Francois Bouchy. Mai sunt multe de aflat despre aceasta noua lume, inclusiv faptul cel mai important: daca ea este situata la o distanta optima fata de steaua sa, unde sa nu fie nici prea frig si nici prea cald, si sa fie posibila existenta apei in forma lichida. Daca super-Terra se afla intr-o astfel de zona, atunci ar putea exista, teoretic, si viata”, mai spune astronomul francez.
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