Venus
It will be the first U.S.-led mission to the Venusian atmosphere since 1978.
There may be bizarre microbes living in the sulfuric acid-laden clouds of the hothouse planet, scientists said.
"...two hundred and fifty degrees, and raining sulphuric acid."
WHAT'S HAPPENING
WHAT'S HAPPENING
Thank you, Tim Peake!
Mercury, Venus, Saturn, Mars and Jupiter will align for first time in a decade.