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Heliosphere

Adapted from Wikipedia · Explorer experience

An artist's illustration showing the heliosheath, the region where the solar wind meets the interstellar medium far beyond Neptune.

The Heliosphere

The heliosphere is a big, bubbly area around our Sun. It is made by something called the solar wind, which is a stream of tiny particles flowing from the Sun. This bubble stretches far out into space, even past the place where Pluto orbits.

The heliosphere helps protect our Solar System from strong space rays. It is not a perfect ball, though. Because the Sun moves and spins, the heliosphere looks more like a comet, with a round front and a long tail called the heliotail.

Inside the heliosphere, there are special places. One is called the termination shock, where the solar wind slows down quickly. After that is the heliosheath, a wide area that leads to the heliopause, the very edge of the heliosphere.

Two amazing spacecraft, Voyager 1 and Voyager 2, traveled through the heliosphere. In 2012, Voyager 1 passed through the heliopause and entered the space between stars. Later, in 2018, Voyager 2 did the same. These spacecraft helped scientists learn a lot about the edges of our solar system.

Images

A scientific visualization of solar wind data collected by NASA's Voyager 1 spacecraft, showing energy levels in space.
An educational diagram showing how space scientists could use the sun as a giant lens to study planets around distant stars.
A stunning view of the Sun captured by NASA’s Solar Dynamics Observatory, showing its bright surface and solar activity.
An illustration of the heliospheric current sheet, a wavy spiral shape created by the Sun's magnetic field in space, often compared to a ballerina's skirt.
A scientific diagram showing different regions of the heliosphere, created using data from the Voyager spacecraft.
Diagram showing the structure of the heliosphere, the vast bubble of solar wind surrounding our solar system, with labeled regions and spacecraft positions.
A colorful diagram showing how Earth's magnetic field affects the heliosphere, the protective bubble of magnetic fields surrounding our solar system.
NASA's fleet of spacecraft used for studying the solar system and space weather.
A colorful map of the night sky showing cosmic X-ray data collected by the IBEX spacecraft.
A scientific diagram showing how particle densities change at the edge of our solar system, as observed by the Voyager spacecraft.
The beautiful Aurora Australis (southern lights) glowing in the night sky as seen from the Space Shuttle Discovery during its mission.
A stunning view of Earth rising over the Moon, captured by astronauts during the Apollo 8 mission in 1968.

Related articles

Sun
Solar wind
Solar System
Comet
Termination shock
Heliosheath

This article is a child-friendly adaptation of the Wikipedia article on Heliosphere, available under CC BY-SA 4.0.

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