The longer the pulsation period of one of these yellow supergiants,
the more luminous the star; so measuring the period determines the star's true, or intrinsic, brightness.
Then as now, astronomers estimated the distances to galaxies by studying Cepheid variables, an unusual class of stars whose brightness rises and falls predictably: The longer the period of variation,
the more luminous the star.
The longer the period, she found,
the more luminous the star.
Just like the GJ436b, these might have been hot Neptunes orbiting around
more luminous stars which would have circulated in their atmosphere that ended up leaving the rocky centre of the planet bare.
Not exact matches
Named PH1, the planet goes around two of the four
stars, shown close - up here: One is a yellow - white F - type
star that is slightly warmer and
more luminous than our sun; the other, at the 11 o'clock position, is a red dwarf, cooler and dimmer than the sun.
Deneb is tied with Orion's foot
star, Rigel, as the most
luminous bright
star in the heavens — a white supergiant,
more dazzling than the famous red variety.
But if the
star is much farther away than that, it is far
more luminous than previously believed — and then the dimming could be a return to normalcy after a merger, as Metzger's team has suggested.
In particular, the CDF - S source is likely associated with the complete destruction of a neutron
star or white dwarf, and is roughly 100,000 times
more luminous in X-rays.
Named V838 Monocerotis, it was
more luminous than normal novae — at peak brightness, it briefly rivaled the most powerful
stars in the Galaxy.
More than just Orion's brightest
star, Rigel is among the most
luminous objects in the galaxy, shining with the light of 55,000 suns.
The pressure of starlight from the
star, which is 23 times
more luminous than the Sun, then expelled the dust far into space.
A total of 6481
stars are plotted and every one of them is
more than a hundred times
more luminous than the Sun.
The temperature of the shell rises; the
star becomes
more luminous; and it finally approaches the top of the giant domain on the Hertzsprung - Russell diagram.
While the Sun produces energy at the rate of about two ergs per gram per second, a
more luminous main - sequence
star can release energy at a rate some 1,000 times greater.
Our substellar companions appear both non-coeval with their primary
stars according to evolutionary models and, as a group, are systematically
more luminous than the Upper Sco cluster sequence.
«The galaxy we have observed, EGS8p7, which is unusually
luminous, may be powered by a population of unusually hot
stars, and it may have special properties that enabled it to create a large bubble of ionized hydrogen much earlier than is possible for
more typical galaxies at these times,» Sirio Belli, a Caltech graduate student who worked on the project, said, in the statement.
The one GOOD thing about these direct hits would be ELIMINATION of thick Hydrogen envelopes around these types of planets when these envelopes were HEATED by MUCH
MORE LUMINOUS HOST
STARS to the point where the envelopes FILLED the planets» Hill spheres.
The prospects for the habitability of M - dwarf planets have long been debated, due to key differences between the unique stellar and planetary environments around these low - mass
stars, as compared to hotter,
more luminous Sun - like
stars.
The
more numerous faint
stars are still in the process of collapsing under their own gravity, but have become hot enough in their centers to be self
luminous bodies.
Yet, the full
star formation and enrichment history of a galaxy can be traced directly only if two key observables can be determined... ▽
More Red giant
stars are perhaps the most important type of
stars for Galactic and extra-galactic archaeology: they are
luminous, occur in all stellar populations, and their surface temperatures allow precise abundance determinations for many different chemical elements.
Planet f initially looks
more promising, but modeling the evolution of the
star makes it seem probable that it has only moved into the habitable zone recently as Tau Ceti has gotten
more luminous over the course of its life,» explains astrophysicist Michael Pagano, ASU postdoctoral researcher and lead author of the paper appearing in the Astrophysical Journal.
The
more luminous a galaxy, the
more mass it possesses (see How
Stars Work).
With over 40 Solar - masses, extremely high luminosity, a variable spectra, and surrounding ejecta, it is classified as a
Luminous Blue Variable like Eta Carinae, as an extremely large
star that are now often regarded as the evolutionary link between main - sequence O
stars and the
more evolved, smaller but similarly explosive, Wolf - Rayet
stars.
The larger a
star (i.e.,
more massive) is, the
more luminous it is (luminosity = mass3).
Likewise, if two
stars are the same temperature but different sizes, then the large
star will be
more luminous than the small one.
The
star is ten times the size of the Sun and 61 times
more luminous.
Epsilon Piscium is an orange giant
star belonging to the stellar class K0 III, slightly larger and
more luminous than the Sun.
Clusters of
luminous, young blue
stars can be seen to have formed in and around the dark, gas - and dust - rich band that bisects the «Hamburger Galaxy» (
more).
Our
Luminous Primer is the unsung and unseen hero of your makeup bag:
more of a behind - the - scenes coordinator that hangs backstage while everyone else plays a
starring role (looking at you, Poppy Lipstick).
«The Fabulous Baker Boys» isn't the most scintillating screenplay, and its runaway box office success probably says
more about the year it was released than the film itself, but it's a wonderfully sumptuous throwback to the grand glamour of old - school Hollywood — and none of its
stars were ever quite as
luminous, before or since.
Well, Noah Baumbach does, and if you consider that his «Frances Ha» lavishes its gorgeous monochromes on contemporary New York and the
luminous countenance of Greta Gerwig (his
star, current g.f. and co-writer), you might suspect that Baumbach's latest owes
more than a tiny debt to Woody Allen's «Manhattan.»
Wonder Woman «s focus on
luminous positivity in the face of the great darkness of World War One, as well as the ease in which its central team play off each other stands out even
more when its lead character
stars in something as flat - footed as this.
Something worth noting is that the address for this new page in Bungie's site is Alpha Lupi, which is the name of the brightest
star in the constellation Lupus, being around 25,000 x
more luminous than our own sun.