What would be the scariest message humanity could receive from outer space?
Astronomy pictures
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This page for educational purpose only.Dm for credit removal.
This page for educational purpose only.Dm for credit removal.
![The nebula around the hot double star BAT99-49 in the Large Magellanic Cloud (LMC), obtained in January 2002 with the FORS1 multi-mode instrument at the 8.2-m VLT MELIPAL telescope at the Paranal Observatory (Chile). It is based on three exposures through narrow-band optical (interference) filters that isolate the light from specific atoms and ions. In this rendering, the blue colour represents the light from singly ionized Helium (He II; wavelength 468.6 nm; exposure time 45 min), green corresponds to doubly ionized oxygen ([O III]; 495.7 + 500.7 nm; 5 min) and red to hydrogen atoms (H; H-alpha line at 656.2 nm; 5 min). Of these three ions, He II is the tracer of high excitation, i.e. the bluest areas of the nebula are the hottest. The sky field measures 400 x 400 square arcsec ; the original pixel size on the 2k x 2k CCD is 0.23 arcsec. North is up and east to the left.
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ESO](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:dvzucmvxelqr6w37suuha4wa/bafkreibbk2jep6gwoic6e7klkxyw76lvgt5lwzmxiiiviug2vwrydavudy)
