• Einstein Rings

    by Granite

    An Einstein ring is created when light from a more distant galaxy or star is bent when it passes a closer massive object closer to Earth. Due to the gravitational lensing, the light from the distant galaxy appears as a arc or a ring.If the source, lens object and observer are all in perfect alignment the light appears as a ring.

  • Ultra High Energy Cosmic Ray Particles

    by Granite

    Some cosmic rays have an almost unbelievable energy. The source of such high energy particles is still a mystery – suggested explanations include young neutron stars and active galactic cores where matter falls into black holes.

  • Consumption of Hydrogen in the Sun

    by Granite

    Nuclear fusion in the Sun consumes about 6 million tonnes of hydrogen per second. Despite this enormous consumption of hydrogen, the sun has enough hydrogen to burn at this rate for the next 4 billion years. 

  • Sagittarius A*, abbreviated as Sgr A*, is the supermassive black hole at the Galactic Center of the Milky Way.  The object was first detected in 1974 as a bright and very compact astronomical radio source. It has now been imaged by a world-wide network of radio observatories and its mass estimated observations of the orbits of nearby stars using very large infrared telescopes.