Trillions of neutrinos from the Sun's interior pass through your body per second, whether it's day or night. The subatomic particles do you no harm; there's no risk of neutrino sunburn or even a tan. Physicists detect them at huge underground labs. #gam2018 #RandomAstroFact

Help needed! You & your home computer can sift through satellite data to find “brown dwarfs” & possibly even the suspected 9th planet of our solar system. Just surf over to http://www.BackyardWorlds.org to get more information & join the hunt. #gam2018 #RandomAstroFact

Comets are usually named for their discoverers, but not Halley's. Edmond Halley (1656-1741) figured out that the comet now named for him returns about every 76 years, confirming that comets are in closed orbits around the Sun. It'll be back in 2061. #gam2018 #RandomAstroFact

The Crab Nebula emits visible light, radio waves, X-rays & more, contains a pulsar spinning 30 times/sec & is expanding at over 900 miles/sec. It's the remains of a supernova explosion of a large star, seen with the naked eye (even in daytime) in 1054. #gam2018 #RandomAstroFact

The attached cartoon is no joke. Astronomers from the Netherlands & USA calculate that 60+ tons per year of organic (carbon-bearing molecules) shed by asteroids & comets are raining down on Mars. The Mars rover Curiosity found evidence of organics there. #gam2018 #RandomAstroFact