Comet K2's Solar Tour is 

Surprising

Comet K2 is swinging past our 

planet this week as it makes its first ever journey from the outermost reaches of the solar system toward the sun

It was discovered by

the Panoramic Survey Telescope and Rapid Response System (PanSTARRS) in Hawaii in May 2017.

The comet was about 17 times

farther away from the sun than Earth is. Scientists call Earth's average distance from the sun an astronomical unit

The comet was emitting 

what scientists call a coma: a fuzzy halo of gas that extended 80,000 miles (130,000 kilometers) into space. 

 That coma forms when

 frozen material on the comet sublimates, or transitions from a solid directly to a gas.

When K2 makes its closest

 approach to Earth on Wednesday (July 13), it will be an underwhelming skywatching target

James Webb Telescope 

Found Water! Where?