It is said that because Mars doesn't have a magnetic field its atmosphere disappeared, but how can solar wind cause that? That the protons and electrons can changes molecules in an atmosphere I can
If you were to divide the present-day universe into cubes with sides 10 million light-years long, each cube would contain, on average, about one galaxy similar in size to the Milky Way. Now suppose…
My question is related to black hole image released in April. As far as I understand idea of EHT, it joins observations from multiple locations to work like one telescope with radius that is equal…
Prior to the era of radar and other forms of radio/RF/EM ranging, what approaches, methods, and techniques did early astronomers (e.g., Kepler, Cassini, Copernicus) use to measure the distance(s) f…
The skeleton of a dinosaur in a museum reminds us of the great extinctions. The Earth has lived at least five mass extinctions throughout its history. The most tragic was the great extinction of the Permian, 225 million years ago. It killed 95% of living things, including trilobites.
Micrometeorites Dictionary of astronomy, letter M They are particles from extraterrestrial space, some thousandths of a millimeter in diameter, that rain incessantly on Earth settling on the bottom of the oceans or on polar caps, where their layers accumulated by time can be easily recognizable.
