Dating of the earth
Since the planet Earth doesn't have a birth certificate to record its formation, scientists have spent hundreds of years struggling to determine the age of the planet.By dating the rocks in the ever-changing crust, as well as neighbors such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years.Although no rocks have been deliberately returned from Mars, samples exist in the form of meteorites that fell to Earth long ago, allowing scientists to make approximations about the age of rocks on the red planet.Some of these samples have been dated to 4.5 billion years old, supporting other calculations of the date of early planetary formation.
The oldest of these have ages between 4.4 and 4.5 billion years.
She has a Bachelor’s degree in English and Astrophysics from Agnes Scott college and served as an intern at Sky & Telescope magazine.
In her free time, she homeschools her four children.
Samples returned from the Apollo and Luna missions revealed ages between 4.4 and 4.5 billion years, helping to constrain the age of Earth.
In addition to the large bodies of the solar system, scientists have also studied smaller rocky visitors to that fell to Earth. Some are cast off from other planets after violent collisions, while others are leftover chunks from the early solar system that never grew large enough to form a cohesive body.
Search for dating of the earth:
In an effort to further refine the age of Earth, scientists began to look outward.