Located in Earth’s southern hemisphere, Australia is the smallest continent among the seven, spanning over 8 million square kilometers or 3 million square miles, National Geographic reports.

Earth, in turn, is nothing more than a molecule in the incomprehensibly vast cosmic ocean. Given the full scope of the universe's size, or even Earth's size in relation to other planets in our […] ...

Israeli scientists are working on a 'trillion dollar' plant to combat global warming. The team is building a one-million-square-mile 'umbrella' to shade Earth from the sun's rays.

Size: Earth has a diameter of 7,926 miles (12,756 kilometers). Distance from the Sun: Earth is the third planet from the Sun, which is about 93 million miles (150 million km) away.