NASA's Solar Probe Will Stellar Closeup

Zip Through Its 12th

NASA's sun-grazing

 spacecraft will make its 12th close flyby of our star on Wednesday

During this flyby

 the Parker Solar Probe will get as close as 5.3 million miles (8.5 million kilometers) of the solar surface

Flying 14 times closer than the

orbit of Mercury — our solar system's closest planet to the sun — Parker will reach a top speed of 364,660 mph (586,860 kph).

That's roughly 21 times faster

 than the International Space Station's speed(opens in new tab) as it orbits Earth.

The exact time of

 the closest approach, known as perihelion, will be 6:50 p.m. EDT (2250 GMT)

Parker isn't set to break

 its speed record again this time, as it has several times throughout its mission.

Massive Mars Dust Storms  Imbalances

Triggered by Heat