Sentences with phrase «astronomers measure»

A light - year is how astronomers measure distance in space.

If the foreground star happens to have any planets orbiting it, these will distort and dim the light from the background star in a noticeable way as well, which will help astronomers measure some of their basic properties, like their mass and orbital period.

Astronomers measure signals in terms of Janskies — 10 - 26 Watts / meter2 / Hertz, and the GBT often measures signals of milli - or even micro-Janskies.

Years of careful measurement of photographic images of the sky led Henrietta Leavitt to a discovery that is fundamental to how astronomers measure the scale of the Universe.

Looking at the light in this way helps astronomers measure the speed and chemical composition of cosmic sources.

Astronomers measure the rotational rates of stars by measuring their brightness over time.

Astronomers measure this using something known as the Schwarzschild radius.

To gauge an object's distance, astronomers measure how much an object's light has been stretched, or reddened, by the expansion of space.

The illusion arises, says Praton, from the way astronomers measure distance to remote regions of the universe.

Astronomers measure the brightness of objects in the sky on a scale of apparent magnitude — the brighter the object, the greater the negative number; the dimmer, the greater the positive number.

The rapid rate of discovery of exoplanets can be attributed to the maturity of Doppler spectroscopy, by which astronomers measure a planet's gravitational tug on its host star, and by a technique involving «transiting» planets — looking for planets that move between their host stars and Earth, the method used by Mandushev to find TrES - 4.

Those daredevil moves let astronomers measure the difference in the gravitational tug the probe experienced from Saturn alone and from the rings and the planet together.

Conventionally, astronomers measure the mass of an exoplanet by measuring the tiny wobbles of the parent star induced by the planet's gravity.

To determine large distances, like the one to GN - z11, astronomers measure the redshift of the observed object.

Astronomers measure the total radiation coming from the sky and subtract off the radiation generated by the instrument itself, by our own planet and civilization, and by known celestial bodies.

Today astronomers measure how much dark matter a cluster of galaxies may have by observing how the cluster bends light from more distant objects.

As described in a Science paper, astronomers measured the motion of gas to a distance approximately 5.5 times the event horizon radius.

The puzzle emerged after astronomers measured the cosmic microwave background — a bath of radiation, left over from the Big Bang — and found only slight variations in its temperature across the entire sky.

Astronomers measuring this radiation will try to test general relativity, the leading theory of gravity, to unprecedented precision.

Associate Professor Daniel Zucker, from Macquarie University and the AAO, said astronomers measured the locations and sizes of dark lines in the spectra to work out the amount of each element in a star.

During those passes, astronomers measured how the intense pull of Saturn's gravity deforms Titan during its 16 - day revolution around the ringed planet.

From Earth, twin telescopes on Cerro Tololo in Chile captured light from ASASSN - 15lh that astronomers measured as 570 billion times brighter than the sun.

To find evidence for the existence of these planets, the astronomers measured how much a star «wobbles» in space as it is affected by a planet's gravity.

The bright light from a supernova explosion, where the distance to the galaxy that hosts the supernova is well established, is the «candle» of choice for astronomers measuring the accelerated expansion of the universe.

The astronomers measured the angular separation between the three magnified images of the galaxy in the Hubble photos.

The H0LiCOW astronomers measured the Hubble constant by exploiting massive galaxies that act as «gravitational lenses,» bending light from a yet more distant object.

Not exact matches

Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang; just as crime detectives can trace the origin of a bullet from the holes in a wall.

January 30, 2013 — Astronomers report the exciting discovery of a new way to measure the mass of supermassive black holes in galaxies.

Transits allow astronomers to measure a planet's size, orbit and exposure to starlight.

Third, Italian astronomer and mathematician Claudio Maccone has developed a mathematical equation to measure the amount of information and entropy representing different civilizations throughout history and compared them with what an alien civilization a million years more advanced than ours might be like.

By the 1930s, American astronomers Vesto Melvin Slipher and Edwin Hubble had measured the movement of distant galaxies, convincing everyone — even Einstein — that the universe was expanding, despite it all.

And because light waves are stretched as they travel through expanding space, the redshift allows astronomers to directly measure that expansion.

The latest study to bolster this argument was presented earlier in the meeting by lead author Courtney Dressing, another CfA astronomer, who measured the masses and sizes of a handful of small transiting planets to estimate the rocky - to - gaseous transition zone.

This data set has allowed astronomers not only to measure distances for far more of these galaxies than before — a total of 1600 — but also to find out much more about each of them.

Leavitt worked out the «period - luminosity relationship» in 1908, giving astronomers a powerful tool for measuring the distance to stars and other astronomical objects.

Using observations from several telescopes, Yale University astronomer Pieter van Dokkum and colleagues studied 10 bright clumps of stars within the galaxy, known as globular clusters, and measured their velocities.

«But Gaia also measures star positions in nearby galaxies», explains University of Groningen astronomer Davide Massari.

Astronomers have long been able to measure the movement of stars in our «line of sight» (i.e. the movement towards or away from us) by measuring the redshift, which is caused by the Doppler effect.

Measuring gravitational waves would allow astronomers to probe phenomena such as the heart of supernovas and could provide insight into the Big Bang.

The telescope's 18 gold - coated mirror segments will allow astronomers to search for the universe's oldest galaxies, observe the formation of stars and measure the physical and chemical properties of planetary systems.

By combining data from the Hubble Space Telescope and the Gaia mission, University of Groningen astronomers have been able to measure the proper motion of 15 stars in the Sculptor Galaxy, the first such measurement of stars in a small galaxy outside the Milky Way.

Throughout the 1970s, astronomers applied these laws to galaxies, hoping to extract a measure of their total mass.

After Hubble found evidence that the universe is expanding, astronomers expected that the attractive force of gravity would continuously slow down the expansion and that by measuring that rate of slowing they could determine the shape and fate of the universe.

Since the 1950s astronomers have solved this problem using «kinematic distances,» calculations that treat objects in the Milky Way a bit like pieces of flotsam spiraling into a whirlpool; because things tend to move faster as they approach the center, measuring how fast an object is moving toward or away from us yields an estimate of its distance from the galactic center — and thus from our solar system.

Last year, x-ray astronomers also found hints of «intermediate» black holes with hundreds to thousands of times our sun's mass in other galaxies (ScienceNOW, 7 June 2001), but they hadn't measured the gravitational pulls of such holes — the best way to confirm their presence and gauge their masses.

Astronomers made the measurements by streamlining and strengthening the construction of the cosmic distance ladder, which is used to measure accurate distances to galaxies near and far from Earth.

Beginning at left, astronomers use Hubble to measure the distances to a class of pulsating stars called Cepheid Variables, employing a basic tool of geometry called parallax.

Using the National Science Foundation's Very Long Baseline Array (VLBA), an interlinked system of 10 radio telescopes stretching across Hawaii, North America and the Caribbean, the astronomers have directly measured the distance to an object called G007.47 +00.05, a star - forming region located on the opposite side of the galaxy from our solar system.

Measuring the distribution of galaxies since that time allows astronomers to measure how dark matter and dark energy have competed to govern the rate of expansion of the Universe.

A team led by ESO astronomer Giacomo Beccari has used these data of unparallelled quality to precisely measure the brightness and colours of all the stars in the Orion Nebula Cluster.