Sentences with phrase «luminosity as»

Viewing angles are nice and stable, although you naturally lose luminosity as you go off - center.

This is not only in the change in GHG / luminosity as evolution tells another story.So one can not use the former explanation without constructing a new evolutionary theory.Hence the paradox.

This is not because they are unusually small, but instead comes from their smaller radii and lower luminosity as compared to the other main category of stars, the giant stars.

The star has a mass around 82 + / -3 percent of Sol's (Bouchy et al, 2005), 0.753 + / - 0.025 percent of its diameter (Winn et al, 2006; Masana et al, 2006; and Bouchy et al, 2005), and a visual luminosity as low as 26.4 percent of Sol's.

Because sun - like stars gradually increase in luminosity as they age, this could mean that Kepler 452 b is a fading, geriatric world, once thriving with life but now withering beneath the slowly brightening light of its sun.

They have absolute luminosities as bright as any star in the Galaxy — on the order of one million times the luminosity of the Sun.

Not exact matches

If these wonderful families, which are such an inspiration to so many, are to reach their full potential and «to radiate the word of truth» that is our Catholic faith in all its luminosity and beauty, then we as a Church must recover the fullness of our faith's teaching on sex and loving.

One star may be the equivalent of 300,000 suns in luminosity, whereas another may amount to only a fifty - thousandth part of it (as great a difference, the astronomer Sir James Jeans observed, as there is between a lighthouse and a glow - worm).

The malware used in these attacks belonged to families that are popular among cyber-criminals, such as ZeuS, Pony / FareIT, LokiBot, Luminosity RAT, NetWire RAT, HawkEye, ISR Stealer and iSpy keylogger.

Once confirmed, a transit allows astronomers to confidently measure a planet's orbital period — its year — as well as to estimate its size, by comparing the depth of its shadow with the estimated dimensions and luminosity of its star.

Even sooner, in as little as a billion years, the sun's gradually increasing luminosity may make Earth unbearable for life.

For decades astronomers have been on the hunt for so - called «solar twins» — stars with the same ages, masses, temperatures, luminosities and chemical abundances as our own sun.

(For older, even more distant galaxies, the researchers were not able to see black hole activity as clearly, but they did set upper limits on x-ray luminosity.)

Well of course luminosity would play an important part in the camoflauge, as if you were more or less luminose then your surrounding then it would beeasy to pick you out.

More recently — especially since the 2009 launch of the Kepler Space Telescope — they have relied on the slight dimming in luminosity that occurs as a planet passes in front of its star, blocking a bit of its light.

As stars run out of hydrogen fuel and burn helium instead, their luminosity waxes and wanes during several phases of pulsation, interspersed with times of relative calm.

Then, as with the Cepheids, he could compare that luminosity with the galaxy's apparent brightness to figure out its true place in deep space.

Astronomers don't yet know which particular conditions could have triggered such «extraordinary luminosity,» as the team that discovered the supernova writes in the 20 October issue of The Astrophysical Journal Letters.

The predictable luminosity of Type Ia supernovae means that astronomers can use them as cosmic standard candles to measure their distances, making them useful tools in studying the cosmos.

What they found: Many of these trypophobia triggers have spectral characteristics — luminosity and contrast features — that resemble those of poisonous animals, such as the deathstalker scorpion and the puffer fish.

Other possibilities — such as intrinsic fluctuations in the star's luminosity or even a black hole with a cold and dusty debris disk drifting across our interstellar line of sight — could also still fit the data.

Several methods are used, such as exploiting the known luminosities of old stars that are just beginning to burn Helium in their cores, and the relationship between the rotation speed of galaxies and the number of stars they possess.

The team found that bright stars are mainly located in the inner disk of M81, while most of the young stars in outlying concentrations are fainter and have similar luminosity distributions as that of the stellar stream between M81 and NGC 3077.

Iota Persei is a yellow - orange main sequence dwarf star of spectral and luminosity type G0 V. Bigger and brighter than Sol, the star may have as much as 1.3 times Sol's mass, around 1.08 times its diameter (Pasinetti - Fracassini et al, 2001; Blackwell and Lynas - Gray, 1994; and Johnson and Wright, 1983, page 653), and 2.2 times its luminosity.

Their luminosity varies on time scales of a few months to as short as a few days.

This paper nicely complements the official papers by the LIGO / Virgo gravitational wave detector team and the NASA's Fermi Gamma - Ray Telescope team by studying the luminosity function of short GRBs as well as the possible physical mechanism that powers this unique event.

Star A is an orange - red, main sequence dwarf star of spectral and luminosity type K1 - 2 V - VI, Bouchy et al, 2005) but was previously catalogued as yellow as G5.

With a visual luminosity that has reportedly varied between 0.000053 and 0.00012 of Sol's (based on a distance of 4.22 light - years) the star is as much as 19,000 times fainter than the Sun, and so if it was placed at the location of our Sun from Earth, the disk of the star would barely be visible.

This hybrid blazar idea implies that the luminosity of BL Lacs should decrease as their core black holes continue to lose energy and spin.

Why must the distance to a galaxy be known first before you can measure such basic properties of the galaxy such as its luminosity, mass, and size?

Supergiant luminosities are not as well known or uniform as the Type Ia supernovae, so astronomers prefer to use the Type Ia supernovae to derive the distances to the very distant galaxies.

Star A is a main sequence dwarf star of spectral and luminosity type F7 - 8 V (Wittenmyer et al, 2006, page 178; Bonavita and Desidera, 2007, HD 16895 in Table 8; and NASA Stars and Exoplanet Database) but has been classed as yellow as F9 (Baize and Petit, 1989, page 505.

After analyzing data from the Kepler Space Telescope, scientists discovered huge dips in KIC 8462852's brightness that lasted between five and 80 days, with the star sometimes losing as much as 20 percent of its luminosity.

It has the same mass as Sol (Bedding et al, 1996, page 1157)-- possibly 1.1 Solar - mass according to Professor Kaler's Mu Herculis page, about 1.77 to 1.86 times Sol's diameter, and about 2.2 to 2.7 (with infrared) times its luminosity.

The spread of luminosities and colours of stars within the main sequence can be understood as a consequence of evolution.

The outer parts of the star expand outward because of the increased burning there, and as the star swells up, its luminosity gradually increases.

The incredible luminosity of a black - hole system known as ULX - 1 may force a rethink of the leading theories that explain how some black holes radiate energy, researchers said.

[41] The luminosity (L) of the star is roughly proportional to the total mass (M) as the following power law:

Below about 0.5 solar masses, the luminosity of the star varies as the mass to the power of 2.3, producing a flattening of the slope on a graph of mass versus luminosity.

Zeta Doradus is a main sequence dwarf star of spectral and luminosity type F7 V but has been classed as white as F6 and as yellow as F9 (Lagrange et al, 2009, page 14 for HD 33262; Trilling et al, 2008, page 26; NASA Stars and Exoplanet Database; and SIMBAD).

Thus the luminosity only increases as the cube of the star's mass.

This has become known as the Period - Luminosity relation.

Barnard's Star is of a variable category known as BY Draconis, stars that show starspots, variations in luminosity and other activity.

This star is probably a yellow - orange main sequence dwarf star of spectral and luminosity type G2 V (Tinney et al, 2011), but it has been classed as orange as a G5.

The sources photometrically identified as Class I are confirmed as objects dominated by accretion luminosity from dense envelopes, with accretion rates 1e - 5 to 1e - 6 Msun / yr.

The star has recently been estimated to have as high as 85 percent Sol's mass (Tinney et al, 2011; and Kovacs and Foy, 1978), and it may have around 92 to 96 percent of its diameter (NASA Star and Exoplanet Database, derived using the power law formula of Kenneth R. Lang, 1980) and about 78 percent of its bolometric luminosity (NASA Star and Exoplanet Database, derived using the exponential formula of Kenneth R. Lang, 1980).

Lambda Serpentis is a main sequence dwarf star of spectral and luminosity type G0 V, but it is listed as a possible subgiant in some catalogues.

Achernar is a blue - white main sequence star of spectral and luminosity type B3 Vpe (Hiltner et al, 1969), that previously had been classed as bright as a subgiant.

This star is a yellow - orange main sequence dwarf star of spectral and luminosity type G0 V, with roughly the same mass as Sol (Irwin et al, 1992), as much as 1.45 times its diameter (George G. Gatewood, 1994, page 143), and less than 1.1 times its luminosity.

Tau Boötis A is a yellowish main sequence dwarf star of spectral and luminosity type F7 V, although it has also been classified as a F6 IV subgiant.