What Would Happen If the Planets Lined Up?

Planetary alignments: They’re the favorite astronomical scenario of kooks, con artists, and Hollywood producers everywhere. But has it ever happened? And what would it do to Earth if it did? ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/artist/52/SciShow Or help support us by subscribing to our page on Subbable: https://subbable.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook:   / scishow   Twitter:   / scishow   Tumblr:   / scishow   Thanks Tank Tumblr:   / thankstank   Sources: http://helios.gsfc.nasa.gov/qa_plan.html http://www.universetoday.com/34076/pl... http://www.nasa.gov/topics/earth/feat... http://imagine.gsfc.nasa.gov/docs/ask... http://science.nasa.gov/science-news/... http://helios.gsfc.nasa.gov/qa_plan.h... http://curious.astro.cornell.edu/ques... http://www.badastronomy.com/bad/misc/... http://content.time.com/time/health/a... http://www.fourmilab.ch/cgi-bin/Solar