why was the earth the last planet discovered?

Question

yes jennifer, the answer is funny, isn't it? we didn't know where we were standing on, did we?
je je je je

OUCH SPARK!!
youre right!!
AAARRRGGGHHH, YOU ruined the fun, jeje.
but youre right, nevertheless jennifer was on the game, so she gets the points

Answer 1

Because at the time the other planets were discovered centuries ago, earth was considered the center of the universe, not a planet.

Answer 2

Strange question, given that the Earth was not the last planet discovered. The latest planet discovered (in 2006) around another star was clearly discovered after the Earth was known to be a planet.

Inside our own solar system, Neptune was discovered after Earth was known to be a planet.

The word "planet" comes from a Greek expression (aster planetes) meaning wandering star. They were celestial bodies that were moving in a regular, predictable manner among the fixed stars:
Helios (Sun) Selene (Moon), Hermes (Mercry), Aphrodite (Venus), Ares (Mars), Zeus (Jupiter) and Chronos (Saturn).

With Kepler and his revolutionnary idea that the solar system revolved around the Sun, not the Earth, astronomers had to accept that Earth was in orbit around the Sun, like the other wandering bodies (except the Moon, clearly in orbit around the Earth).

The Sun was promoted to stardom (literally), the Moon demoted to being a satellite. The word planet was limited to the other wandering bodies that shone by reflecting sunlight, and the Earth was added to the list of planets. Astronomers already knew that Earth reflected sunlight back in space (just after new moon, you can see the 'ashen light' that allows us to see the rest of the moon: the old moon in the arms of the new moon).

Depending on where astronomers lived (and how fearful they were of being branded as heretic), the Earth became a planet sometime around the end of the 16th century. Galileo got in trouble for promoting the idea in the early 17th century. By the time Isaac Newton wrote about his theory of gravity (around 1687), Earth's status as a planet was firmly established.

Uranus (1781), Ceres (1801), Neptune (1846), Pluto (1930) were all "discovered" as planets after Earth was recognised as a planet.

Some people say that Ceres and Pluto do not count as they have since been demoted. Also, Uranus and Neptune had been seen before: for example, Neptune is present on a drawing made by Galileo on 28 December 1612. There were many more who saw them. However, they thought they were stars, not planets.

To make the Earth the last planet to be discovered, some people say that Neptune was seen in 1612, before Earth was recognised as a planet. However, I'm sure that lots of people saw Earth well before 1612, even if they did not recognise it as a planet. So, even under this definition, Neptune comes after Earth.

Answer 3

at first earth was considered as the center of the universe ,but i don't no why u have such an idea that earth is discoved last after the declaration that the earth is a planet some other planets such as neptune etc r discovered

Answer 4

We thought that the entire universe revolved around us. That made us think that what we lived on was not like the rest of the planets, that we, the Earth, were special.

Answer 5

It wasn't. We were aware that the earth was a planet long before Uranus and Neptune were discovered.

Answer 6

People were looking up instead of down. They even thought the earth was flat instead of round. Sorry, that almost rhymes.

Answer 7

Because they thought the earth was flat and they thought that earth was not a planet!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 8

We were busy elsewhere in your galaxy.