Introduction to physics

Comments

Post a Comment

Popular posts from this blog

ESA Astronomers Just Revealed The Sharpest Ever Image of a Star in Another Solar System

Image
This artist’s impression shows the red supergiant star Antares. Image credit: M. Kornmesser / ESO. An international team of astronomers from Chile and Germany has managed to capture an image of unprecedented detail of another star — that isn’t the Sun — the red supergiant star Antares. The team has also made the first map of the velocities of material in the atmosphere of a star other than the Sun, revealing unexpected turbulence in the extended atmosphere of Antares. Antares, also designated Alpha Scorpii, is a well-studied, close red supergiant star at a distance of 554 light years. It is the fifteenth-brightest star in the night sky and the brightest star in the constellation of Scorpius. With a diameter about 700 times that of the Sun and a mass about 12 times solar, Antares is one of largest stars. This is the most detailed image ever of the red supergiant star Antares, or any other star apart from the Sun. Image credit: K. Ohnaka / ESO. It is thought that Ant...
Read more

HUBBLE JUST REVEALED THE WEIRDEST GALAXY EVER DISCOVERED-- "THE SNAKE GALAXY"

Image
This weird yet amazing Cosmic Snake galaxy is actually behind a massive galaxy cluster called MACS J1206.2-0847, but thanks to the cluster’s gravity, we can see it directly from Earth. Light from the distant galaxy arrives at Earth, having been distorted by the gigantic gravitational influence of the intervening cluster. Fascinatingly, instead of making it more difficult to perceive cosmological objects, such strong lensing effects improve the resolution and depth of an image by magnifying the background object. Sometimes gravitational lensing can even produce multiple images of the object as light is bent in different directions around the foreground cluster.  Using Hubble, Dr. Antonio Cava of the Université de Genève and co-authors looked at several such images of the Cosmic Snake, each with a different level of magnification. “The amplified images are more precise, luminous, and allows us to observe details up to 100 times smaller,” Dr. Cava said.  The Hubble ...
Read more

Cassini Spotted Something Unexpected In Saturn's Rings Before It Plunged To Its Doom

Image
Scientists using data from the Cassini spacecraft have discovered something unusual about the shadow cast on Saturn by its rings. Cassini was sent  crashing into Saturn  in September as its mission came to an end. However, in its final months, it dipped to between 2,600 and 4,000 kilometers (1,600 and 2,500 miles) above the planet to gather invaluable science. Research conducted by scientists in Sweden and the US, and published in  Science , looked at data from this period. And they found that the shadow of the ring, which Cassini flew through, was having a direct effect on the ionosphere of Saturn – its upper atmosphere. “The ionosphere is surprisingly variable and structured on small scales,” a short  statement  from the team read. “One reason for that is shadows cast by the rings, which block ultraviolet radiation from the Sun, thereby reducing the ionization in those regions.” On these passes, the Radio and Plasma Wave Science instrumen...
Read more