Introduction to Space

The Big Bang produced 75% Hydrogen and 25% Helium. Other elements are made in stars.

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​Origin of the Elements

https://svs.gsfc.nasa.gov/13873

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Astronomy (តារាវិទ្យា)

Astrology (តារាសាស្ត្រ)

Cosmology

Meteorology​ (ឧតុភូតវិទ្យា)

​After 70 years of research

On Monday, December 5th 2022, at 1:03 AM, researchers at the Lawrence Livermore National Lab achieved “fusion ignition” for the first time on Earth.

• Andromeda is 2.5 million light-years away

• will collide with Milky Way in 4.5 billions years

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• supermassive black hole at the Galactic Center of the Milky Way.

• April 2019: First image of a supermassive black hole at the center of M87 galaxy released by Event Horizon Telescope (first capture in 2017). It took two years for scientists to piece it together from 8 EHT around the globe.

​M87 Supermassive black hole: 6.5 billion times the mass of the sun