Interstellar Visitor is Really a Comet Not an Asteroid

Artist impression of ‘Oumuamua (Credit: ESA/Hubble, NASA, ESO, M. Kornmesser)

PARIS (ESA PR) — An object from another star system that made a brief appearance in our skies guised as an asteroid turns out to be a tiny interstellar comet.

‘Oumuamua, a name that reflects the Hawaiian meaning for ‘a messenger from afar, arriving first’, was discovered by astronomers working with the Pan-STARRS survey in Hawaii in October last year as the object came close to Earth’s orbit. Follow-up observations by ESA’s Optical Ground Station telescope in Tenerife, Canary Islands, and other telescopes around the world helped determine its trajectory.

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Join the Planetary Defenders on Saturday

Video Caption: On Saturday, 30 June, watch live when scientists, mission planners, asteroid experts and astronauts from ESA, the European Southern Observatory and worldwide bring you the latest news and science from the work they do to help defend our planet. Watch online from the ESO Supernova planetarium, 30 June 13:00 CEST: http://www.esa.int/asteroidday

Planet Found in Habitable Zone Around Nearest Star

Artist's impression of the planet orbiting Proxima Centauri. (Credit: ESO)
Artist’s impression of the planet orbiting Proxima Centauri. (Credit: ESO)

Pale Red Dot campaign reveals Earth-mass world in orbit around Proxima Centauri

GARCHING BEI MUNCHEN, Germany (ESO PR) — Astronomers using ESO telescopes and other facilities have found clear evidence of a planet orbiting the closest star to Earth, Proxima Centauri. The long-sought world, designated Proxima b, orbits its cool red parent star every 11 days and has a temperature suitable for liquid water to exist on its surface. This rocky world is a little more massive than the Earth and is the closest exoplanet to us — and it may also be the closest possible abode for life outside the Solar System. A paper describing this milestone finding will be published in the journal Nature on 25 August 2016.

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ESO Announces Discovery of 32 New Exoplanets

eso_Gliese_667
An artist's conception of a planet orbiting Gliese 667 C. The 6 Earth-mass exoplanet circulates around its low-mass host star at a distance equal to only 1/20th of the Earth-Sun distance. The host star is a companion to two other low-mass stars, which are seen here in the distance. Credit: ESO/L. Calçada

ESO PRESS RELEASE

Today, at an international ESO/CAUP exoplanet conference in Porto, the team who built the High Accuracy Radial Velocity Planet Searcher, better known as HARPS, the spectrograph for ESO’s 3.6-metre telescope, reports on the incredible discovery of some 32 new exoplanets, cementing HARPS’s position as the world’s foremost exoplanet hunter. This result also increases the number of known low-mass planets by an impressive 30%. Over the past five years HARPS has spotted more than 75 of the roughly 400 or so exoplanets now known.

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