0
POPSThe Great Radio Controversy This article proves that Jagadishchandra Bose, an Indian scientist had invented Radio Transmission technology well before Mr. Marconi, however, just fitting to be an Indian, he never attempted to get a patent or get a commercial benefit out of it. And the world as ever goes always behind the things that shine and glitter.
12
POPSCosmic crash unmasks dark matter It looks as if it is being seen through lots of little lenses. And each of these lenses represents a piece of dark matter. Astronomers used the Chandra X-ray telescope to map ordinary matter in the merging clusters, mostly in the form of hot gas, which glows brightly in X-rays. As the two clusters that formed MACSJ0025 merged at speeds of millions of kilometres per hour, hot gas in the two clusters collided and slowed down. However, the dark matter kept on going, passing right through the smash-up. The latest astronomical observations suggest that dark matter makes up some 23% of the Universe. Ordinary matter - such as the galaxies, gas, stars and planets - makes up just 4%. The remaining 73% is made up of another mysterious quantity; dark energy, which is responsible for speeding up the expansion of the cosmos.
1
POPSMicrobes Could Travel from Venus to Earth So our first life may have come from Venus or, you guessed, Mars. This gives greater credence to the book "Men are From Mars, Women are From Venus." (The book needs all the credibility it can get)
2
POPSFinding the weight of black holes This is a composite image of data from NASA’s Chandra X-ray Observatory (shown in purple) and Hubble Space Telescope (blue) of the giant elliptical galaxy, NGC 4649, located about 51 million light-years from Earth.
2
POPSHungry, hungry black holes The conclusion comes from a large observing campaign of the spiral galaxy M81, which is about 12 million light-years from Earth. In the center of M81 is a black hole that is about 70 million times more massive than the Sun, and generates energy and radiation as it pulls gas in the central region of the galaxy inwards at high speed.
3
POPSFamous supernovae still echo across the Milky Way Read to understand pic. In 1572, the Danish astronomer Tycho Brahe observed and studied the explosion of a star that became known as Tycho's supernova. More than four centuries later, Chandra's X-ray photograph of the supernova remnant shows an expanding bubble of multimillion degree debris (green and red) inside a more rapidly moving shell of extremely high energy electrons (filamentary blue). Astronomers have detected a light echo from this supernova, meaning they can see the light from the explosion itself 400 years later.
1
Pops
Newest Clips
Latest Comments
Most Pops
Print
Save
Turn on live update