Although the moon is our only permanent natural satellite, astronomers have discovered many other near-Earth objects that could be considered honorary 'mini' moons
The simple answer is that Earth has only one moon, which we call “
”. It is the largest and brightest object in the night sky, and the only solar system body besides Earth that humans have visited in our space exploration efforts.When Earth first formed, around 4.5 billion years ago, it had no moons, but that soon changed. Researchers believe that the proto-Earth was struck by an object the size of Mars, nicknamed Theia, blasting much of its crust into orbit.
These fall into a few groups. First there are temporary satellites; objects that have been captured by Earth’s gravity, putting them into orbit before they eventually escape again. We know of only two – a small asteroid called
Norge Siste Nytt, Norge Overskrifter
Similar News:Du kan også lese nyheter som ligner på denne som vi har samlet inn fra andre nyhetskilder.
Chemicals Left Over from Early Earth Might Be Sitting Near CoreSeismic waves passing through a mysterious ultra-low velocity zone in Earth's mantle might reveal the earliest chemicals formed on Earth.
Les mer »
Near-Earth Asteroids Could Supply Future Meteor ShowersMost meteor showers are associated with comets, but asteroid-driven showers might be more common than previously thought.
Les mer »
The 'Second Moon' You Didn't Know Earth Had3753 Cruithne is what’s called a quasi-orbital satellite of Earth.
Les mer »
Here’s the best spot on Earth to see polar bears in the wildPolar bear populations are dwindling. But on Alaska’s north coast, visitors can still spot these magnificent predators away from crowds.
Les mer »
The 'Second Moon' You Didn't Know Earth Had3753 Cruithne is what’s called a quasi-orbital satellite of Earth.
Les mer »