Sentences with phrase «astronomers know the universe»

Not exact matches

Astronomers know now that the universe will continue to expand and separate until it eventually loses its ability to regenerate stars, thus extinguishing all light, heat, and physical life.

So the astronomer Laplace said, if he could know the position and momentum of every particle in the universe he could predict the future of the universe completely.

General relativity came on the scene before anyone knew that the universe is expanding, a time when astronomers could not be certain that those fuzzy splotches of light in the sky were actually other galaxies.

Since Hubble's guess that every star has the same luminosity is not strictly true, to chart the universe's expansion astronomers needed more reliable cosmic candles — celestial objects that they could trust to burn with the same luminosity no matter how far from Earth.

Tom Theuns and Liang Gao, astronomers at Durham University in England, used a computer model last year to study how two types of dark matter, known as warm and cold, may have influenced the formation of the very first stars in the universe — and the first giant black holes.

The idea that the universe was made just for us — known as the anthropic principle — debuted in 1973 when Brandon Carter, then a physicist at Cambridge University, spoke at a conference in Poland honoring Copernicus, the 16th - century astronomer who said that the sun, not Earth, was the hub of the universe.

The other side of darkness In April's Sky Lights [«A Lighter Shade of Black»] Bob Berman presents the paradox suggested by astronomer Heinrich Olbers: «If we live in an infinite universe containing an infinite number of stars, then... every point of the sky, no matter how small, should be filled with starlight....

Astronomers at the University of Minnesota have identified the largest known void in the universe, a cosmological no - man's - land where stars, planets, and even dark matter are mysteriously absent.

Because the properties of these nearby nurseries are known, the feat will help astronomers better understand conditions in far - off star - forming galaxies — where, ironically enough, Lyman alpha is easier to detect because the expanding universe redshifts the radiation to longer wavelengths so that sunlight doesn't muck up the view.

Since the mid 1990s, astronomers have known that every galaxy in the universe harbors a supermassive black hole at its center.

Astronomers calculated that it shone when the universe was 750 million years old, but they didn't know how big it was or how long its stars had lived.

Conversely, if the vacuum energy were negative, it would cause the universe to rapidly re-collapse and there would be no time for astronomers, at least the type we know, to come into existence.

Astronomers have long known that at the largest scale, the universe looks like sea - foam: clusters of galaxies surrounding large, empty bubbles.

When stellar cataclysms known as type Ia supernovae flare up far across the universe, their brightness and consistency allow astronomers to use them as so - called standard candles to measure cosmological distances.

Astronomers know that the first galaxies during their forming stages were chemically simple — primarily made up of hydrogen and helium, elements made in the Big Bang during the first three minutes of the universe's existence.

Astronomers know it exists only because it interacts with our slice of the ordinary universe through gravity.

In Beyond Biocentrism, acclaimed biologist Robert Lanza, one of TIME Magazine's 100 Most Influential People in 2014, and leading astronomer Bob Berman, take the reader on an intellectual thrill - ride as they re-examine everything we thought we knew about life, death, the universe and the nature of reality itself.

In this talk, UCLA astronomer Tommaso Treu briefly reviews the history of the discovery of dark matter and dark energy and describes how we can gain new insights by studying the trajectories of photons as they travel across the universe, a phenomenon known as strong gravitational lensing.

By identifying two classes of «Cepheid variable» stars, astronomer Walter Baade refines the extragalactic distance scale - the estimated size of the known universe doubles