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Preview: ESA Science & Technology

ESA Science & Technology

News on the space science missions of the European Space Agency

Copyright: Copyright 1999-2016 ESA

Observable Universe contains ten times more galaxies than previously thought [heic1620]

Thu, 13 Oct 2016 14:00:00 UT

Astronomers using data from the NASA/ESA Hubble Space Telescopes and other telescopes have performed an accurate census of the number of galaxies in the Universe. The group came to the surprising conclusion that there are at least 10 times as many galaxies in the observable Universe as previously thought. The results have clear implications for our understanding of galaxy formation, and also help solve an ancient astronomical paradox – why is the sky dark at night?

CometWatch from Kepler

Fri, 07 Oct 2016 16:48:00 UT

During the last month of Rosetta's operations at Comet 67P/Churyumov-Gerasimenko, it was no longer possible to observe the comet with telescopes on Earth because it was too close to the Sun's position in the sky and therefore not visible in the night-time. Fortunately, NASA's Kepler space observatory stepped in, taking images of the comet every 30 minutes from 7 to 20 September, providing important context to Rosetta's in situ measurements.

The LISA Pathfinder Science Archive is online

Fri, 07 Oct 2016 09:24:00 UT

Today, ESA's LISA Pathfinder Science Archive opens its virtual gates to the world. It contains data collected by the satellite during the mission's first few months, covering the nominal operations phase of the LISA Technology Package (LTP) – the European payload on LISA Pathfinder.

Mission complete: Rosetta’s journey ends in daring descent to comet

Fri, 30 Sep 2016 10:19:00 UT

ESA’s historic Rosetta mission has concluded as planned, with the controlled impact onto the comet it had been investigating for more than two years.

Rosetta measures production of water at comet over two years

Tue, 27 Sep 2016 12:49:00 UT

Over the past two years, Rosetta has kept a close eye on many properties of Comet 67P/Churyumov-Gerasimenko, tracking how these changed along the comet's orbit. A very crucial aspect concerns how much water vapour a comet releases into space, and how the water production rate varies at different distances from the Sun. For the first time, Rosetta enabled scientists to monitor this quantity and its evolution in situ over two years.

Gaia's billion-star map hints at treasures to come

Tue, 13 Sep 2016 13:32:00 UT

The first catalogue of more than a billion stars from ESA's Gaia satellite was published today – the largest all-sky survey of celestial objects to date.

XMM-Newton Announcement of Opportunity (AO-16)

Tue, 23 Aug 2016 09:48:00 UT

Proposals are solicited for observations with XMM-Newton in response to the sixteenth Announcement of Opportunity, AO-16, issued 23 August 2016. This AO covers the period May 2017 to April 2018 and is open to proposers from all over the world.

Cosmic explosions: the first ESA–Ars Electronica residency

Wed, 03 Aug 2016 09:48:00 UT

Aoife van Linden Tol, an artist working primarily with explosive media, is the recipient of the first art&science@ESA residency, organised by Ars Electronica in partnership with ESA.