New Horizons at Jupiter

NASA's New Horizons spacecraft began its journey to Pluto January 19, 2006. The most vital part of the mission since then occurred in February 2007, when it flew past Jupiter.

By Richard Talcott

Published: February 22, 2010

In this artist's rendering, New Horizons soars past Jupiter as the volcanic moon Io passes between the spacecraft and planet.

Photo by JHUAPL/SwRI

When NASA and the New Horizons team planned this mission to Pluto, speed was a paramount concern. Pluto made its closest approach to the Sun in 1989. Ever since, the icy dwarf planet has been heading into the solar system's outer reaches, growing colder with each passing year. If New Horizons didn't reach Pluto quickly, the planet's tenuous atmosphere might completely freeze onto the surface. And scientists wouldn't get another chance to observe the atmosphere until Pluto warmed up again in the 23rd century.

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	Sun	Sun	Moon
RISE	—		—	PHASE	—
SET	—		—	DISK	—

	Mercury	Mercury	Venus	Venus
RISE	—		—
SET	—		—
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	Mars	Mars	Jupiter	Jupiter	Saturn	Saturn
RISE	—		—		—
SET	—		—		—
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