but one will temporarily disappear from view. Mars, Venus, Jupiter, Saturn, Uranus and Neptune will all be visible at the same time, splayed out across the night sky in a huge arc. Venus ...

Mars and Jupiter will be in conjunction, meaning basically on top of each other, making them fairly easy to view, even without a telescope. The two planets will be one-third of a degree apart ...

An curved arrow pointing right. 2015 marked 50 years of successful NASA missions to Mars which started with Mariner 4 in 1965. These are the NASA rovers and satellites currently exploring the planet.