The 51-year-old Outer Space Treaty, which obligates the U.S. and other signers to avoid the “harmful contamination” of other celestial bodies
Researcher Andrew Vanderburg said he would be surprised if there wasn't even more planets lurking to add to the newly discovered systems
Within the habitable, or "Goldilocks" zone, temperatures are not too hot or too cold but just right for surface water to exist as a liquid
The winning applicant must have 20 years of experience & must have held a leading role on a large-scale radio telescope project...
The present-day surface is more uninhabitable than previously thought
Not everyone is convinced the photos show definitive signs of life on Mars...
There are theories on the possibility of intelligent alien life attempting to make contact
To date astronomers have discovered 3.450 confirmed exoplanets