Update on the New Horizons mission: Final flight plan approved. Next stop, Pluto!…
Three weeks from a historic flyby of the dwarf planet Pluto, operators of the New Horizons spacecraft are poring over images and data streaming in from the probe to determine if any final trajectory adjustments will be necessary to steer…
Three billion miles from Earth, the New Horizons space probe sent back its first images of Pluto and its largest moon Charon. Moving at 31,000 miles per hour, New Horizons is set to snap more photos in the coming months,…
On Saturday night at 9:30 p.m. ET, an alarm clock went off for NASA’s New Horizon probe, 2.9 billion miles away from Earth. At 9:52 p.m., the piano-size spacecraft sent a message back to Johns Hopkins Applied Physics Laboratory…
Members of the International Astronomical Union voted in August to reclassify Pluto as a "dwarf planet." Many astronomers, however, are unhappy with the demotion -- they question its scientific validity and the way the decision was made.
Top international astronomers voted Thursday to strip Pluto's planetary status that it has held since its discovery in 1930. The celestial object is now redefined as a "dwarf planet," leaving just eight major planets in the solar system.
After years of debate over Pluto's planetary status, the International Astronomical Union voted Thursday to classify the celestial object as a "dwarf planet," thereby shrinking the number of major planets in the solar system to eight.
Astronomers attending an international summit in Prague plan to vote next week on a new classification of Pluto-like objects that will redefine the solar system. Experts discuss the proposed solution to the long-standing debate over whether Pluto is a planet.
After two days of unexpected delays, NASA's New Horizons spacecraft took off aboard an Atlas V rocket headed towards Pluto Thursday.
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