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IC 63 — nicknamed the Ghost Nebula — is about 550 light-years from Earth. The nebula is classified as both a reflection nebula — as it is reflecting the light of a nearby star — and as an emission nebula — as it releases hydrogen-alpha radiation. Both effects are caused by the gigantic star Gamma Cassiopeiae. The radiation of this star is also slowly causing the nebula to dissipate. Credit:ESA/Hubble, NASA

Hubble captures the ghost of Cassiopeia

About 550 light-years away in the constellation of Cassiopeia lies IC 63, a stunning and slightly eerie nebula. Also known as the ghost of...
The galaxy cluster Abell 370 was the first target of the BUFFALO survey, which aims to search for some of the first galaxies in the Universe. Credit: NASA, ESA, A. Koekemoer, M. Jauzac, C. Steinhardt, and the BUFFALO team

BUFFALO charges towards the earliest galaxies

The NASA/ESA Hubble Space Telescope has started a new mission to shed light on the evolution of the earliest galaxies in the Universe. The...
The image, observed with the Space Telescope Imaging Spectrograph in the ultraviolet, shows the auroras surrounding Saturn’s north pole region. In comparing the different observations it became clear that Saturn’s auroras show a rich variety of emissions with highly variable localised features. The variability of the auroras is influenced by both the solar wind and the rapid rotation of Saturn.

Hubble observes energetic lightshow at Saturn’s north pole

Astronomers using the NASA/ESA Hubble Space Telescope have taken a series of spectacular images featuring the fluttering auroras at the north pole of Saturn....
From Witterswil to Mars: Professor Nikolaus Kuhn tests the operation of a specially developed camera with a model of the ExoMars Rover. (Image: University of Basel, Florian Moritz)

Researchers are testing camera for Mars rover

The European Space Agency (ESA) is sending a rover into space in 2020 to examine the surface of Mars for signs of life. This...
Esa’S Next Miniature Satellite Propelled By Butane

ESA’s Next Miniature Satellite Propelled By Butane

ESA's next miniature satellite will be its first ready to change orbit. On account of a conservative thruster taking a butane cigarette lighter, the...

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