Sentences with phrase «ultraviolet radiation emitted»

These are the glowing remains of the stellar envelope of gas ejected during the AGB phase, which is ionised by ultraviolet radiation emitted by the central star.

For example, from laboratory experiments we can determine the amount of amino acids produced per photon of ultraviolet radiation, and from our knowledge of stellar evolution we can calculate the amount of ultraviolet radiation emitted by the sun over the first billion years of the existence of the earth.

Researchers looked at seven of these worlds — distant planets whose mass lies between one and 10 times ours — including 55 Cancri e (at right, compared to Earth) and GJ1214b, evaluating how the x-ray and extreme ultraviolet radiation emitted by their parent stars might affect their atmospheres over their remaining lifetimes.

The observed amount of ultraviolet radiation emitted by TRAPPIST - 1 indeed suggests that the planets could have lost gigantic amounts of water over the course of their history.

Not exact matches

The HPA tested a sample of compact fluorescent light bulbs (CFLs) and found that some emitted ultraviolet radiation which could, under certain conditions, expose people above international guidelines.

In addition to emitting visible light, the stars also gave off ultraviolet (UV) radiation, which split the neutral hydrogen it encountered into electrons and protons — ionizing it once again, and thereby launching what researchers call the «epoch of reionization.»

In particular, astronomers would like to see the Milky Way's star - forming regions emit ultraviolet radiation known as Lyman alpha because it's expected to be both strong and a key diagnostic of conditions in stellar nurseries.

In fluorescence microscopy, certain specimens, such as TB bacteria, can be dyed so that they emit light when exposed to ultraviolet radiation.

«They emit powerful winds and a lot of ultraviolet radiation.»

The star has emitted a flare that made it 68 times brighter than usual, and could expose any life on its orbiting Earth - sized planet to fatal levels of ultraviolet radiation.

As the plane wave travels along, the pattern oscillates rapidly, causing it to emit ultraviolet radiation that the researchers observe.

Life could eventually spread farther when such stars evolve pass their flare stage, since spectral - type M stars emit much less ultraviolet radiation once they quiet down.

Massive stars emit a large amount of ultraviolet radiation that destroys the molecules and dust surrounding the star and creates ionized gas, which in turn impedes the star's growth process.

When the star's ultraviolet radiation strikes the gases in the nebula, they heat up, giving out radiation ranging in wavelength from blue — emitted by hot oxygen in the bubble near the star — to yellow — emitted by hot hydrogen and nitrogen.

When gas falls toward the black hole at the center of the galaxy NGC 4151, the gas heats up and emits ultraviolet radiation, which in turn heats the ring - shaped dust cloud orbiting the black hole at a distance.

Eventually, as the early stars grew in numbers and brightness, they would have emitted enough ultraviolet radiation to «reionize» the hydrogen, removing the electrons from their bonded protons and neutrons.

The first stars, however, also began emitting intense ultraviolet radiation that «re-ionized» neutral hydrogen atoms formed after the Big Bang by tearing electrons from their proton nuclei.

Although only 1 percent of the sun's energy is emitted at ultraviolet wavelengths between 200 and 300 nanometers, the decrease in this radiation from 1 July 1981 to 30 June 1985 accounted for 19 percent of the decrease in the total irradiance over the same period.»

All hot objects emit electromagnetic radiation, which includes radio waves, visible light, and x - rays, as well as ultraviolet and infrared radiation.