Using a technique that measures how much gravity bends light, astronomers say they have spotted early stars in galaxies more than 13 billion light-years away.
Images made by taking very deep exposures, then subtracting away all known light sources appear to show the light from the very first stars in the universe. Still up for debate but moving through the peer review system
“The evolution of the universe is described by the physics of general relativity, which was discovered by Albert Einstein in the early 20th century. When compared to Newtonian physics, this theory provides a radically different framework for the physical description of the gravitational force.”
This tiny ball provides evidence that the universe will expand forever. Measuring slightly over one tenth of a millimeter, the ball moves toward a smooth plate in response to energy fluctuations in the vacuum of empty space. The attraction is known as the Casimir Effect.
Astronomers might have seen the very first stars in the universe. If so, these are incredible stars, some 1,000 times as massive as the Sun.
Astronomers at New York City’s Hayden Planetarium and Rose Center for Earth and Space think space exploration should be easily accessible to anyone. To make that possible, they offer an interactive atlas of the universe that anyone can download for free.
10 of the greatest pictures of the universe.
The expansion of the universe over most of its history has been relatively gradual. The notion that a rapid period “inflation” preceded the Big Bang expansion was first put forth 25 years ago. The new WMAP observations favor specific inflation scenarios over other long held ideas
Using a microwave probe of U.S. space agency NASA, scientists said they have evidence that the universe has a shape somewhat akin to an egg, rather than the expected round.