If Our Universe Is So Old and Vast, Then Where Are All the Aliens?
The age of the universe and its vast number of stars suggests that extraterrestrial life should be common. If that’s the case, then where is everyone? In this infographic we explore some possibilities, ranging from the Zoo Hypothesis to the Technological Singularity
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Billions and Billions
M 81 (Bode’s Galaxy), M 82 (Cigar Galaxy) and part of IFN, Messier 81 (Bode’s Galaxy or NGC 3031) and Messier 82 (Cigar Galaxy or NGC 3034) are respectively spiral and starburst galaxy about 12 million light-years away in the constellation Ursa Major.This couple is seen through the faint glow of an Integrated Flux Nebulae (or IFN). Credit: Emil Ivanov
Trifid Nebula - Wikipedia
~~The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is located in Sagittarius. Its name means 'divided into three lobes'. The object is an unusual combination of an open cluster of stars; an emission nebula (the lower, red portion), a reflection nebula (the upper, blue portion) and a dark nebula (the apparent 'gaps' within the emission nebula that cause the trifurcated appearance | Wikipedia~~