Earth

Earth is the third planet in the Sol System.

4,599,900,000 - 4,590,000,000 years ago

 * Earth formed.

4,400,000,000 billion years ago

 * The oldest known rocks on Earth form.

3,800,000,000 billion years ago

 * Life started on Earth.

500,000 years from now

 * Earth will be hit by a meteorite that is roughly 1km in diameter.

250,000,000 years from now

 * Earth's continents will be fused into a supercontinent.

600,000,000 years from now

 * Solar eclipses will no longer be possible because the Moon will be too far away from Earth.
 * Earth's temperature will increase, causing water to evaporate.
 * C3 photosynthesis will no longer be possible, all plants that use it will die out.

800,000,000 years from now

 * C4 photosynthesis will no longer be possible, multicellular life will die out.

1,000,000,000 years from now

 * Earth's average temperature will be 47°C/166 °F.

1,400,000,000 - 1,600,000,000 years from now

 * Earth will no longer be in the Sun's habitable zone.

2,800,000,000 years from now

 * Earth's average temperature will be 147°C/296 °F.
 * What's left of Earth's life will die out.

3,300,000,000 years from now

 * 1% chance of happening, Mercury will collide with Venus, then they wil collide with Earth.

3,500,000,000 years from now

 * Earth's surface conditions will be similar to Venus's are today.

7,500,000,000 years from now

 * Earth and Mars may become tidally locked with the Sun.

7,900,000,000 ​years from now

 * Earth may be destroyed by the Sun's expansion.

Other Facts

 * Earth's average surface temperature is 14-15°C /57-59°F.
 * Earth is comprised of:
 * Iron (32.1%)
 * Oxygen (30.1%)
 * Silicon (15.1%)
 * Magnesium (13.9%)
 * Sulfur (2.9%)
 * Nickle (1.8%)
 * Calcium (1.5%)
 * Aluminium (1.4%)
 * Other elements (1.2%)
 * Earth's atmosphere is comprised of:
 * Nitrogen (78.08%)
 * Oxygen (20.95%)
 * Water vapour (about 1%)
 * Argon (0.93%)
 * Carbon dioxide (0.093%)