Interstellar medium
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The interstellar medium is the matter and radiation that exists in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and co
Voyager 1 is the first human made object to reach the interstellar medium.
Three-dimensional structure in Pillars of Creation.
Interstellar medium and astrosphere meeting
This light-year-long knot of interstellar gas and dust resembles a caterpillar.
Voyager 1
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Voyager 1 is a space probe launched by NASA on September 5, 1977, as part of the Voyager program, to study the outer Solar System and the interstellar space beyond the Sun's heliosphere. It was launch
Interstellar medium
…between stars and the ISM helps determine the rate at which a galaxy depletes its gaseous content, and therefore its lifespan of active star formation. Voyager 1 reached the ISM on August 25, 2012, making it the first artificial object from Earth to do so. Interstellar plasma and dust will be studied until the…
Locations of Voyager's scientific instruments
Voyager 1 lifted off atop a Titan IIIE.
Jupiter's Great Red Spot as seen from Voyager 1
Voyager 1 image of Valhalla, a multi-ring impact structure 3,800 km in diameter on Callisto.