You may have never heard of the heliosphere before, but it's important.

It is an invisible shield made up of charged particles from the sun that creates a protective bubble around our entire solar system.

NASA is about to launch space probes to study the heliosphere as part of a program called the Interstellar Mapping and Acceleration Probe.

"IMAP is going to study the heliosphere, study how it interacts with the interstellar medium outside, and give us all kinds of great insights into how it is affected by solar activity," said John Gagosian, director of NASA's Joint Agency Satellite Division.

Three separate spacecraft are being launched together to track solar activity in different ways from the same destination called "L1" in deep space, 1 million miles from Earth.

"It's really

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