Earth
Earth is the third planet from the Sun and the fifth largest planet in the solar system in terms of mass and size.
The only celestial object that has an outstanding characteristic to host life. 29.2% of the Earth’s surface is land, and the remaining 70.8% is covered by water. Earth’s atmosphere consists mainly of nitrogen and oxygen.
The Earth orbits the Sun once every 365.25 days; meanwhile, it rotates around an imaginary line called an axis that runs from the North Pole to the South Pole. It takes 23.934 hours to complete one revolution on its axis.
Earth is traveling through a massive dust cloud since 33,000 years
Ancient star explosions revealed in the deep sea.
Robotic telescope spotted closest known asteroid to fly by Earth
It was not big enough to do any damage.
100 cool worlds discovered near the Sun
Citizen scientists help locate some of the coolest brown dwarfs ever discovered.
Entire cities could fit inside Moon’s monstrous lava tubes
Scientists studied the subsurface cavities that lava created underground on Mars and the Moon.
NASA’s THEMIS mission solved aurora mysteries
NASA spacecraft uncover mystery behind auroral beads.
NASA finally received the first-ever signal from the lunar orbiter
Laser beams reflected between earth and moon boost science.
A young sub-Neptune-sized planet offers clues on planet formation and evolution
The planet is dense for its size and age.
Early Mars was covered in ice sheets, not free-flowing rivers
The findings effectively throw cold water on the dominant "warm and wet ancient Mars" hypothesis.