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Astronauts mix cement on ISS, pave way for future space colonies
As cement hardens through a process called hydration, the molecules within the mixture develop millions of microscopic crystals, like those seen in this screenshot from the NASA video below. These interlocking crystals help the cement molecules bind with each other, as well as other concrete ing…
Astronomers watch as a black hole's jet wobbles like a top
Back in 2015, the black hole V404 Cygni got the attention of astronomers all over the globe when it suddenly brightened for two weeks. The outburst happened as the black hole began gobbling up material from a star that orbits it once every six days. As the material swirled into the black hole, i…
Astronomers finally confirm methane on Mars
Researchers have independently confirmed, for the first time, the detection of methane on Mars. For fifteen years, various research groups have claimed to see traces of methane in Mars’ atmosphere. Intriguingly, these often appear as puffs of gas that appear and disappear over short timescales. …