From 1807 to 1845 eleven planets were recognized in the solar system. Which one of these four was not a recognized planet at that time?
Up until the 18th century just six planets were identified in the solar system Mercury, Venus, Earth, Mars, Jupiter, Saturn. Uranus and other bodies were discovered in the 18th and early 19th centuries. In the 19th century astronomers began to realize that recently discovered bodies that had been classified as planets Vesta, Juno, Ceres, Pallas had a much smaller mass; as a result they were reclassified as "asteroids". Neptune was discovered in 1846.
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32 Comments
kofmana
The question is made not correctly, since all the four were not recognized planets at that time, not only Neptune. Therefore, all the answers are correct. To exclude all the answers, except of one, the question should be modified: "Which one of these four was not a recognized planet at that time but became a recognized planet later."
JRW
Robert Henderson, Elgar wrote this in the 19 hundreds. Long after 1845.
Stephen Forest
Totally confusing. Agree with theajoritg.
earlepg
Just as said by Carol Cottrell, thanks to majority.
Jaimi McEntire
Ceres was recognized as a planet during that time frame. It has since been reclassified as a "dwarf" planet.
Jas Newman
As has been noted, all the options are valid, so the correct answer should have been "all of the above."
jack patti go
Got it
Debbie Rose
Only Neptune is a planet even now, so 'Duh'
silrem
I remembered Neptune was hidden behind Jupiter for a long time.
Jack Scott
Juno, I was wrong
Robert Henderson
none were recognised as planets at this time look at Elgar's Planets suite ony Neptune of this group was included.
Carol Brooks
Got it right but bad question. None of these were recognized as planets at that time.
Brendan Grainger
According to the explanation Neptune was not recognized as a planet until 1846
Carole Cottrell
Thanks majority!
Sue Fairweather
Got it