China National Space Administration launched its 300th Long March mission last week. Long March 3B rocket launched on March 10 that took off from Xichang…
Supernova 1987A was the closest exploding star seen in modern times. It occurred in the Large Magellanic Cloud, a small galaxy that orbits our own Milky Way. Given the incredible amounts of energy in a supernova explosion, as much as the sun creates during its entire lifetime, another erroneous doomsday theory is that such an explosion could happen in 2012 and harm life on Earth. However, given the vastness of space and the long times between supernovae, astronomers can say with certainty that there is no threatening star close enough to hurt Earth. Astronomers estimate that, on average, about one or two supernovae explode each century in our galaxy. But for Earth’s ozone layer to experience damage from a supernova, the blast must occur less than 50 light-years away.
All of the nearby stars capable of going supernova are much farther than this. Another explosive event, called a gamma-ray burst (GRB), is often associated with supernovae. A gamma-ray burst could affect Earth in much the same way as a supernova, but only if its jet is directly pointed our way. Astronomers estimate that a gamma-ray burst could affect Earth from up to 10,000 light-years away with each separated by about 15 million years, on average. So far, the closest burst on record, known as GRB 031203, was 1.3 billion light-years away.
New Data About Formation Sun and its Inner Planets
Globular Cluster NGC 6401
Satellite Which Affects on Its Planet
Jupiter Moon Europa Ocean May Be Too Acidic for Life
Russian Spacecraft Soyuz returned to the Earth
Telescope Hershel Found Young Protostars
Stephen Hawking Gives Definition What Happened Before the Big Bang
Top 10 Brightest Stars in the Night Sky