PRAGUE, Czech Republic ” Leading astronomers declared Thursday that Pluto is no longer a planet under historic new guidelines that downsize the solar system from nine planets to eight. After a ...

Capping years of intense debate, astronomers resolved today (Aug. 24) to demote Pluto in a wholesale redefinition of planethood that is being billed as a victory of scientific reasoning over historic ...

In 2006, the International Astronomical Union (IAU) voted on the definition of a planet. Famously, Pluto no longer met the criteria and was demoted to a dwarf planet. Things have been a bit of a mess ...

To some people, Pluto's demotion from planet to dwarf planet status in 2006 was one of the most devastating astronomical losses since the death of Spock. But a new study suggests Pluto should (also ...

Space Matter is a weekly column that delves into space science and the mechanics of spaceflight. From the latest discoveries in the universe around us to the fits and starts of rocket test flights, ...

A surprising number of people were outraged when a group of astronomers "demoted" Pluto from a planet to a dwarf planet in 2006. Passionate Earthlings launched protests and petitions. Popular ...

If you’re someone who is still upset about Pluto’s planetary demotion from more than a decade ago, then an upcoming debate about the definition of the word “planet” may be of interest to you. One of ...

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Anyone fuming over Pluto’s demotion from full-fledged planet to dwarf planet in 2006 will be happy to hear that there is still hope. Pro-Plutonians recently suggested a new definition of a planet that ...

Will Pluto have the last laugh? A group of NASA scientists hopes so. A group of members of the New Horizons mission to Pluto are making the case to redefine what constitutes as a planet to be more ...

It reached Pluto in about 9 yearsUnmanned spacecraft "New Horizons" was the first human being to show the detailed image of Pluto in photographsAlthough it is reported in the news etc., NASA has ...

PRAGUE, Czech Republic ” For decades, it’s been confused with a cartoon dog and ridiculed as a puny poser. Now Pluto, the solar system’s consummate cling-on, has suffered its worst humiliation: It’s ...