#5 If you flip a shark over, it goes into a trance.

Closer than since 2003! Even closer now than when we passed between Mars and the sun last Friday. How that can happen, and the prospects for viewing Mars through a telescope now.

Jupiter's moon Europa is a promising place to search for evidence of alien life. New research provides insights on what might be the best - and easiest - way to search.

The technology is further along than you might think for capturing solar energy in space - where the sun always shines - and beaming it to Earth.

At first glance, it's just a square filled with tiny grains of static. But incredible as it is to imagine, every single point of light in this image is actually a distant galaxy, as observed by ESA’s Herschel Space Observatory.

Mars was brighter in late July than it had been since 2003. Then - on July 27 - that very bright Mars appeared near the moon as it was undergoing a total eclipse.

An eclipse season lasts a little over one lunar month and typically includes 1 solar and 1 lunar eclipse. In 1 out of 7 eclipse seasons, the 1st eclipse comes early. Then we can have 3 eclipses. Watch for a 3rd eclipse in this eclipse season, in August!

Kairo Kiitsak captured an impressive display of noctilucent, or night-shining, clouds, in Simuna, Estonia on July 26, 2018. Noctilucent clouds are seen at high latitudes only from about mid-May to August. Wondrous, if you can catch them!

“Mars wouldn’t be nearly this dusty if it wasn’t for this one enormous deposit that is gradually eroding over time and polluting the planet, essentially.”

More details and more charts, from Guy Ottewell.