Skip to main content

Featured

Massive Stars and their approximate Size

Astronomers have found massive stars in the early universe, primarily located in distant galaxies that formed shortly after the Big Bang. These regions are often studied through advanced telescopes capable of observing very distant light, such as the Hubble Space Telescope and the upcoming James Webb Space Telescope. In terms of size, these monster stars can have diameters ranging from about 100 to over 300 times that of our Sun. The Sun’s diameter is approximately 1.4 million kilometers (about 864,000 miles), so these massive stars could be approximately 140 million to over 420 million kilometers (about 87 million to 261 million miles) in diameter.

The coolest experiment in the universe

NASA's Cold Atom Laboratory on the International Space Station is the first facility in orbit to produce clouds of "ultracold" atoms, which can reach a fraction of a degree above absolute zero. Nothing in nature is known to hit the temperatures achieved in laboratories like CAL, which means the orbiting facility is regularly the coldest known spot in the universe.

from Astronomy News -- ScienceDaily http://bit.ly/2EGVXV8

Comments

Popular Posts