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Time Lapse Aurora / Northern Lights Seen From Finland
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By European Space Agency
Image: This Copernicus Sentinel-2 image features swirls of vivid, emerald green algal blooms in the Gulf of Finland. View the full article
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By European Space Agency
For the first time, the NASA/ESA/CSA James Webb Space Telescope has observed the chemical signature of carbon-rich dust grains at redshift ~ 7 [1], which is roughly equivalent to one billion years after the birth of the Universe [2]. Similar observational signatures have been observed in the much more recent Universe, attributed to complex, carbon-based molecules known as polycyclic aromatic hydrocarbons (PAHs). It is not thought likely, however, that PAHs would have developed within the first billion years of cosmic time.
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By European Space Agency
Video: 00:02:23 ESA’s Hera mission for planetary defence will perform a close-up survey of the Dimorphos asteroid in deep space. But first Hera needs to cross millions of kilometres of space to get there. That is the task of Hera’s Propulsion Module, forming around half of the overall spacecraft, which has been prepared by Italy’s Avio company. Formed of a central tube plus a supporting structure, the Module has been fitted with propellant tanks, piping and thrusters (inside the red protective covers). But before it can be joined to Hera’s other element, the Core Module, this Propulsion Module had to undergo its crucial ‘global leak test’ – as seen here. The Module has been filled with gaseous nitrogen, then placed inside its container. Sensors added to the interior can detect any pressure change inside the container over the course of the night. Success means Hera is ready to travel to OHB in Germany to be mated with the Core Module. At this point the Hera spacecraft will be complete, and the mission will come a major step nearer to space. Next rendezvous for Hera is the Environmental Test campaign at ESTEC, to make sure Hera survives in the harsh launch and space environment…
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