Dwarf planet’s temporary atmosphere linked to Sun’s activity

It’s long been thought that Ceres may have a very weak, transient atmosphere, but mysteries lingered about its origin and why it’s not always present

Watch NOW: ‘April Fool’s Day’ comet swings by Earth

Join Slooh as Comet 41P/Tuttle-Giacobini-Kresak makes its close approach

A miniature solar observatory will be flight tested on a six-hour high-altitude balloon mission scheduled for the end of August