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Age of Earth. The age of Earth is estimated to be 4.54 ± 0.05 billion years (4.54 × 109 years ± 1%).[1][2][3][4] This age may represent the age of Earth 's accretion, or core formation, or of the material from which Earth formed. [2] This dating is based on evidence from radiometric age-dating of meteorite [5] material and is consistent with ...
Earth has a dynamic atmosphere, which sustains Earth's surface conditions and protects it from most meteoroids and UV-light at entry. It has a composition of primarily nitrogen and oxygen. Water vapor is widely present in the atmosphere, forming clouds that cover most of the planet. The water vapor acts as a greenhouse gas and, together with other greenhouse gases in the atmosphere ...
NASA Earth Science is a large, umbrella program comprising a range of terrestrial and space-based collection systems in order to better understand the Earth system and its response to natural and human-caused changes.
Timeline of first images of Earth from space Photography and other imagery of planet Earth from outer space [a] started in the 1940s, first from rockets in suborbital flight, subsequently from satellites around Earth, and then from spacecraft beyond Earth's orbit.
The natural history of Earth concerns the development of planet Earth from its formation to the present day. [1][2] Nearly all branches of natural science have contributed to understanding of the main events of Earth's past, characterized by constant geological change and biological evolution.
The International Space Station(ISS) is a large space stationthat was assembledand is maintained in low Earth orbitby a collaboration of five space agencies and their contractors: NASA(United States), Roscosmos(Russia), ESA(Europe), JAXA(Japan), and CSA(Canada). The ISS is the largest space station ever built. Its primary purpose is to perform microgravityand space environmentexperiments. [10]
Neil deGrasse Tyson (US: / dəˈɡræs / də-GRASS or UK: / dəˈɡrɑːs / də-GRAHSS; born October 5, 1958) is an American astrophysicist, author, and science communicator. Tyson studied at Harvard University, the University of Texas at Austin, and Columbia University. From 1991 to 1994, he was a postdoctoral research associate at Princeton ...
Astronauts on the International Space Station age slightly slower than the rest of us on Earth due to time-dilation effects. Here's how it works.