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2. Location of Earth - Wikipedia

   en.wikipedia.org/wiki/Location_of_Earth

   Earth Location. Logarithmic representation of the universe centered on the Solar System. Celestial bodies on this graphic are clickable and shown with their sizes enlarged. Knowledge of the location of Earth has been shaped by 400 years of telescopic observations, and has expanded radically since the start of the 20th century.

3. Earth - Wikipedia

   en.wikipedia.org/wiki/Earth

   Earth is rounded into an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light-minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution.

4. Discovery and exploration of the Solar System - Wikipedia

   en.wikipedia.org/wiki/Discovery_and_exploration...

   At that time, Uranus, Neptune, nor the asteroid belts had been discovered yet. Discovery and exploration of the Solar System is observation, visitation, and increase in knowledge and understanding of Earth 's "cosmic neighborhood". [1] This includes the Sun, Earth and the Moon, the major planets Mercury, Venus, Mars, Jupiter, Saturn, Uranus ...

5. NASA's Space Place - Wikipedia

   en.wikipedia.org/wiki/NASA's_Space_Place

   The site includes informative articles, hands-on activities, and interactive web games. [2][3] In addition to its content geared toward children, there are resources for parents and educators. It was one of the first NASA websites to produce a companion Spanish language site. Space Place is produced by a team at the Jet Propulsion Laboratory.

6. History of the center of the Universe - Wikipedia

   en.wikipedia.org/wiki/History_of_the_center_of...

   With the development of the heliocentric model by Nicolaus Copernicus in the 16th century, the Sun was believed to be the center of the Universe, with the planets (including Earth) and stars orbiting it. In the early-20th century, the discovery of other galaxies and the development of the Big Bang theory, led to the development of cosmological ...

7. Earth's orbit - Wikipedia

   en.wikipedia.org/wiki/Earth's_orbit

   Earth orbit (yellow) compared to a circle (gray) Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), or 8.317 light-minutes, [1] in a counterclockwise direction as viewed from above the Northern Hemisphere. One complete orbit takes 365.256 days (1 sidereal year), during which time Earth has traveled 940 million ...