Sentences with word «astronomer»

An astronomer is a person who studies celestial objects, such as stars, planets, and galaxies, to gain a better understanding of the universe. Full definition
The cloud rotating into view at the lower - right limb grew into the large storm that was seen by amateur astronomers at visible wavelengths.
A team of astronomers says it has found a new and remarkably simple way to measure the mass of a black hole: examine the shape of its home galaxy.
This age, however, differs significantly from the age estimated by another method which has been used by astronomers for decades.
Consider the orders of magnitude astronomers use when discussing the universe.
This suggests the model is correct, a relief for astronomers who use it to explain many phenomena.
It has attracted thousands of astronomers from around the world.
We have perhaps more than 50 Japanese amateur astronomers in our association who take video images almost every night.
They also allow astronomers to test their models of how stars evolve.
The technique, in use for about a decade, has helped astronomers discover more than 300 large planets.
It can only be seen well on long - exposure photographs and is often used by amateur astronomers as a test of their observing skill.
Typical open clusters can contain anything from a few tens to a few thousands of stars, and provide astronomers with clues about stellar evolution.
Modern astronomers believe the rings are perhaps only a hundred million years young.
At first astronomers thought they might have detected a planet around a single star somewhere in our galaxy.
As astronomers discover more and more planets orbiting other stars, our solar system looks increasingly unusual.
Some in the astronomy community specifically credit radio astronomers for facilitating such international open access.
So it came as a surprise when astronomers discovered in 1998 that the universe is expanding faster and faster, not ever more slowly.
When astronomers look at the distribution of galaxies on scales of billions of light - years they find that they are not evenly distributed.
What did astronomers find in this alien solar system?
Most astronomers do not encounter unusual hazards in their work.
That is exactly how astronomers now believe most black holes form.
Last month, a team of astronomers announced the discovery of the first alien world that could host life on its surface.
The cloud blocks the star itself from optical view, so astronomers study the star indirectly by using the cloud to learn details about the star growing inside.
This will give astronomers in this country an input into some of the most exciting telescope projects of the next two decades.
Other astronomers say the method of pulling faint planetary signals out of background noise needs to be verified.
Many astronomers think they come from outside the galaxy, but beyond that, their origins remain mysterious.
The results are statistically more accurate than those obtained from professional astronomers — even though the experts in the field rarely use their limited time to classify a quarter - million galaxies.
This week an international team of astronomers reports the first multiple - star system to be observed during the earliest stage of formation.
A calculation based on the neutron star's rotation period and its rate of slowing produces what astronomers call its «characteristic age,» which has been presumed to be the true age.
Current telescopes could barely detect light reflected from a hole at the outskirts of our solar system, even if astronomers knew where to look.
What astronomers hope to finally see when they add up all the signals is a halo of light surrounding a dark circle — the shadow of the black hole.
The end result is that galaxies have a slight preference to be separated by a characteristic distance that astronomers call the acoustic scale.
Just last month, the collision of a pair of neutron stars was observed in both light and gravity through a joint effort involving thousands of astronomers on every continent in the world.
Most astronomers now believe that the sun was born in a cloud of gas and dust full of other young stars.
The answer lies in its density, and according to a group of American astronomers the distortion of light by the gravity of nearby galaxy clusters may provide a way to measure it.
The cosmic gas selectively absorbs light at very specific frequencies which astronomers refer to as «absorption lines».
Today, they announced the detection of a fifth such disturbance — but this time astronomers saw it, too, at every wavelength of light from gamma radiation to radio waves.
To verify its capability, astronomers observe well - known objects and compare the results with those with existing telescopes.
The repeat observations will help astronomers detect changes in stars and galaxies in an unprecedented way, probe dark matter and dark energy, and discover transient phenomena such as stellar explosions.
Almost from the time astronomers first turned their telescopes on the planet shining in the night sky, we've imagined life there.
So astronomers estimate, using some of the techniques below.
It's also where astronomers expect to find the galaxy's highest density of dark matter, which only affects normal matter and radiation through its gravity.
Finding water in the universe is not unusual, but that strong signal enabled astronomers to measure the amount of water vapor in the planet's atmosphere.
But these hyper - luminous episodes last only a tiny fraction of a galaxy's lifetime, which is why astronomers need to be very lucky to catch any given galaxy in the act.
The binary interaction model where a companion star is present is gaining traction because astronomers realize that at least 70 percent of massive stars are members of double - star systems.
Images like this one will help astronomers understand how dust behaves inside galaxies, which in turn will help us understand galaxies as a whole.
Looking at the light in this way helps astronomers measure the speed and chemical composition of cosmic sources.
British and German astronomers have discovered a new planet which could support life.
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