Sentences with phrase «intrinsic luminosity»

Sirius is the brightest star in the night sky because of its intrinsic luminosity and its proximity to earth, and is probably the inspiration for the nursery rhyme «Star Light, Star Bright.»

It has a visual magnitude of 7.5 and an absolute magnitude of -0.5, which means that the nebula has an intrinsic luminosity roughly 100 times that of the Sun.

Because of the extreme intrinsic luminosity of M54 in comparison to the other globular clusters associated with SagDEG, it has been speculated early that M54 may be the nucleus of this dwarf galaxy, or the remnant of its nucleus (Bassino and Muzzio, 1995).

As for most planetary nebulae, the distance of M27 (and thus true dimension and intrinsic luminosity) is not very well known.

Adopting our value of 1200 light years, the intrinsic luminosity of the gaseous nebula is about 100 times that of the Sun (about -0.5 Mag absolute) while the star is at about +6 (1/3 of the Sun) and the companion at +9.

Both teams eventually claimed they could calculate intrinsic luminosity to within about 10 percent, an astonishing level of accuracy.

Over the past decade, researchers have carefully calibrated the intrinsic luminosity of type Ia supernovae, so the distance to one of these explosions can be determined from its apparent brightness.

To take advantage of this simple fact requires finding astronomical objects that have a known intrinsic luminosity — the amount of radiation per second produced by the object — and that can be seen across the universe.

Not exact matches

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.

SN 2006gy had a luminosity (or intrinsic brightness) equal to that of some 50 billion suns — around 10 times brighter than host galaxy NGC 1260 — before beginning a slow decline.