Sentences with phrase «motions of galaxies»

For one, general relativity alone can not explain the observed motions of galaxies or the way the universe seems to expand.

But the existence of galaxies outside our own posed another question, about the apparent motions of those galaxies away from one another.

In the last decade, two independent and sometimes competitive research groups have used some of the most luminous objects in the universe — exploding stars dubbed Type Ia supernovas — to gauge the distances and motions of galaxies with unprecedented precision.

This release will not provide proper motion measurements for stars in dwarf galaxies like Sculptor with sufficient precision to investigate the motions of individual stars, but the measurements will be precise enough to study the bulk motion of the galaxy.

Its Own Opposite While some researchers parse the motions of galaxies in their search for dark matter, others are hunting for evidence in the form of telltale particles.

It reveals its presence only by its gravitational effects, guiding the evolution of the early universe and still affecting the motion of galaxies.

Measurements of the bending of light, the motions of galaxies, and the brightness of distant exploding stars have revealed a new truth: Unseen elements, collectively called dark matter and dark energy, account for roughly 96 percent of the mass of the universe.

Philip Diamond, an astronomer at Jodrell Bank Observatory in Cheshire, UK, says the motions of galaxies in the «Local Group» — the Milky Way's neighbouring galaxies — will reveal the pull of invisible dark matter in the region.

However the effect is subtle, and the shape of a void is also affected by the motions of galaxies caused by strong gravitational interactions.

The nearly imperceptible «sideways» motion of a galaxy has been directly measured for the first time beyond the Milky Way and its immediate galactic neighbours.

Moffat claims that his theory would also eliminate the need for dark matter and dark energy — two phenomena, as yet undetected, that physicists have invoked to account for the motions of galaxies and the expansion of the universe.

With this minor change, which kicks in when accelerations dip below one 10 - billionth of a meter per second every second, Milgrom found that he could perfectly predict the motions of galaxies without introducing the fudge factor of dark matter.

In 1933, the Swiss astronomer Fritz Zwicky (pictured, right), working at the California Institute of Technology in Pasadena, applied this principle to the motion of galaxies that make up the Coma cluster, a group of over 1000 galaxies some 300 million light years from us.

He became disenchanted with dark matter in the early 1980s, when he began to wonder if it might be possible to explain the motions of galaxies without filling most of the universe with vast quantities of an undetectable mystery substance.

The motion of galaxies and other astrophysical observations have provided strong evidence that dark matter makes up 80 per cent of the mass in the universe, but we can't see it directly because it is invisible to light.

This radiation, the afterglow of the big bang, permeates all of space and serves as a «reference frame» against which the motion of galaxies can be measured.

Dark matter betrays its presence mainly by the gravitational influence it exerts on the motions of galaxies.

Astronomers reason dark matter must exist because of its gravitational pull, which shows up as an inexplicable tug on the motion of galaxies, but they don't actually know what it is.

For more than 40 years, the Arecibo Observatory has measured the motions of galaxies, mapped the surface of Venus, studied the physics of pulsars, and listened for signals from extraterrestrial life.

Seth and his team estimated the masses with a technique known as adaptive optics, which offsets the blurring effects of the atmosphere and lets them make precise measurements of the motions of the galaxies» stars.

«With the motions of the galaxies, we can infer where all of the mass is located: the galaxies and the 5 times more abundant transparent matter (usually wrongly called dark matter).

Instead, there's a far simpler explanation: The motion of galaxies is due to the stretching of space between those galaxies.

Astronomers studying the motions of galaxies and the character of the cosmic microwave background radiation came to realize in the last century that most of the matter in the universe was not visible.

Much like is done in measuring the masses of galaxies from the motions of the stars and gas clouds in them, you can use the motions of the galaxies in the clusters to measure the masses of the galaxy clusters.

He was best known in the field for work on the motion of stars, the formation of the galaxy, spiral structures and chemical evolution of galaxies, and the distributions and motions of galaxies and quasars.

In the 1930s, astronomer Fritz Zwicky first noticed that the motion of galaxies he was studying in the Coma cluster couldn't be accounted for by the gravity from visible matter of stars, gas, and dust.

Others are using it to study the motions of galaxy clusters.