Asteroids are small, rocky bodies that have been left over from the formation of the planets 4.5 billion…
Earth is a moving target in a shooting gallery. Almost every day, a small chunk of space rock…
Every day about 50 tonnes of rocky material from space lands on the Earth’s surface. These rocks are…
In March 1986, ESA’s Giotto spacecraft flew to within 600 km of comet Halley’s nucleus. It sent back…
Most asteroids are so small and so far away that we can only see them as tiny points…
Even with the largest telescopes it is very hard to see much detail on Mars. In the late…
The Cassini-Huygens mission, involving ESA, NASA and the Italian Space Agency, has changed many of our ideas about…
Månen har kretset rundt Jorden i mer enn fire milliarder år. Men hvor kom den fra…
Everyone on Earth is a traveller through space. First, the Earth zooms around the Sun at a speed…
Pictures sent back by spacecraft such as ESA’s Mars Express show that Mars has many large impact craters.…
Studies of fossils in ancient rocks tell us that life probably began about 4 billion years ago, when…
The Moon is too small to hold onto any air. Without any winds, the sunny side is hotter…
Millions of years ago, the Moon was much closer and bigger in the sky. It was also spinning…
In 1877, the American astronomer Asaph Hall discovered two small moons circling the planet Mars. They were named…
Earth is like no other planet that we have yet observed. It is the only world we know…
Saturn has 31 known moons – more than any other planet except Jupiter. One of them, Titan, is…
Saturn is famous as the ‘lord of the rings’, even though the other three giant gas planets –…
Saturn is the sixth planet from the Sun. It was thought to be the furthest of the planets…
Mars is often called the ‘Red Planet’ because it appears in the sky as an orange-red star. The…
Earth is the largest of the four rocky planets in our Solar System. It is very heavy for…
Titan is larger than the planet Mercury. It is also the second largest moon in the Solar System,…
In many ways, Mars is the most Earthlike of all the planets. A visitor would find that a…
Det tar millioner av år før de fleste stjerner dør. Når en stjerne som Solen har brent opp alt av…
Solen er en stjerne. Som de fleste stjerner er Solen en kule av svært varm gass som…
Vi bor i en av armene til en stor spiralgalakse som kalles Melkeveien. Solen…
Akkurat som mennesker blir stjerner født, blir de gamle og dør. De blir født i enorme, kalde skyer…
De fleste astronomer mener at universet oppsto ved et Big Bang for rundt 14 milliarder år siden. På den tiden,…
I verdensrommet kan ingen høre deg skrike. Dette skyldes at det ikke finnes luft i verdensrommet –…
Vi kan ikke se noe av det som skjedde i løpet av universets første 300 000 år. Forskere prøver å…
I dag er forskerne ikke så sikre på at livet oppsto på eller nær jordoverflaten. Uansett hvor vi ser hen,…
