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Astronomers are constantly finding new planets orbiting stars other than our sun. In 2005 astronomers discovered a new object, later named Eris, which almost become the tenth planet. The discussion of this object resulted in a new definition of a planet which excluded Eris.
New stars, different planetary designs, new celestial bodies, new moons, etc.
No. Most follow the new IAU definition of a planet which excludes Pluto.
No, not all astronomers consider Pluto a planet. Pluto was reclassified as a dwarf planet in 2006 by the International Astronomical Union, leading to debate among scientists about its classification. Some astronomers argue that Pluto does not meet all the criteria to be considered a full planet.
Astronomers have newly discovered a planet , Gliese 581g, within the "Goldilocks" zone - see related link to the news article .
Since the beginning of astronomy. Astronomers are ALWAYS looking for new things.
well back of Pluto there is a planet but they are still learning about it.
Astronomers are constantly finding new planets orbiting stars other than our sun. In 2005 astronomers discovered a new object, later named Eris, which almost become the tenth planet. The discussion of this object resulted in a new definition of a planet which excluded Eris.
New stars, different planetary designs, new celestial bodies, new moons, etc.
Astronomers have decided that Pluto does not meet the definition of a planet.
No. Most follow the new IAU definition of a planet which excludes Pluto.
Astronomers had noticed unexpected changes in the orbit of Uranus: the only explanation was another planet. Detailed study of the orbit of Uranus led to estimates about the size and location of Neptune.
Astronomers think Pluto is a dwarf planet. And they're right.
I want to discover a previously unknown planet with my new telescope.
2019
pluto
No, not all astronomers consider Pluto a planet. Pluto was reclassified as a dwarf planet in 2006 by the International Astronomical Union, leading to debate among scientists about its classification. Some astronomers argue that Pluto does not meet all the criteria to be considered a full planet.