Blue marbles18 February 2019
Blue marbles18 February 2019 Sitting beyond Jupiter and Saturn in our Solar System, these two planets have only been visited once by a spacecraft, albeit briefly. NASA’s Voyager 2 spacecraft swung by Uranus in 1986, and Neptune in 1989, snapping the only close-up detailed images...
Welcome home Rosetta12 February 2019
Welcome home Rosetta12 February 2019 It is always reassuring to catch that first familiar glimpse of home after a great adventure, but for our space-faring satellites the return visit is brief and of a practical nature: to use the planet’s immense gravity to sling it onto a new trajectory.
Gaia clocks new speeds for Milky Way-Andromeda collision08 February 2019
Gaia clocks new speeds for Milky Way-Andromeda collision08 February 2019 ESA’s Gaia satellite has looked beyond our Galaxy and explored two nearby galaxies to reveal the stellar motions within them and how they will one day interact and collide with the Milky Way – with surprising results.
Active galaxies point to new physics of cosmic expansion29 January 2019
Active galaxies point to new physics of cosmic expansion29 January 2019 Investigating the history of our cosmos with a large sample of distant ‘active’ galaxies observed by ESA’s XMM-Newton, a team of astronomers found there might be more to the early expansion of the Universe than predicted by the standard model of cosmo...
The ins and outs of stellar occultations26 January 2019
The ins and outs of stellar occultations26 January 2019 On the night between Sunday 20 and Monday 21 January, many people across the world were treated to the spectacle of the lunar eclipse.
Spotlight on Antarctica21 January 2019
Spotlight on Antarctica21 January 2019 This ethereal image was taken by Daniel Michalik, currently a research fellow at ESA. It was shortlisted as a finalist in the Royal Society photography competition in 2017, and went on to become the overall winner in the ‘Astronomy’ cat...