US President Barack Obama won re-election today defeating Republican challenger Mitt Romney, giving an epic speech before thousands of supporters at a convention center in Chicago, the president's hometown.
A large asteroid that flies in nearly the same orbit as Earth will make a close pass by the planet, but there's no chance of an impact - at least for hundreds of years, astronomers said today.
Seven months after NASA's rover Curiosity landed on Mars to assess if the planet most like Earth had the ingredients for life, scientists have their answer: Yes.
An unmanned Chinese spacecraft returned to Earth successfully today after more than two weeks in orbit, marking a pivotal moment for the rising power's plans to secure a long-term manned foothold in space.
One of the rarest astronomical events occurs on Tuesday and Wednesday when the planet Venus passes directly between the sun and Earth, a transit that won't occur again until 2117.
Astronomers have found a new planet, the closest yet outside our solar system and just an astronomical stone's throw away at four light years, raising the chances of finding a habitable planet in Earth's neighbourhood.
A defunct NASA science satellite is expected to fall back to Earth on Friday, showering debris somewhere on the planet although scientists cannot predict exactly where, officials said.
The Earth's natural resources like food, water and forests are being depleted at an alarming speed, causing hunger, conflict, social unrest and species extinction, experts at a climate and health conference in London warned today.
A black asteroid as big as an aircraft carrier zoomed past Earth, delighting astronomers who trained telescopes on the ancient body in hopes of learning more about its composition and origin.