Which is a characteristic of globular star clusters?
Which is a characteristic of globular star clusters?
Globular clusters are extremely luminous objects. Their mean luminosity is the equivalent of approximately 25,000 Suns. The most luminous are 50 times brighter. The brightest stars are the red giants, bright red stars with an absolute magnitude of −2, about 600 times the Sun’s brightness, or luminosity.
What is a brown dwarf star quizlet?
Brown dwarf. A star-like object that has insufficient mass to start nuclear reactions in its core and thus become self-luminous. They can have brief periods of deuterium fusion.
How do we distinguish stars from brown dwarfs?
Like stars, they can host their own planets. One way to tell the difference is that brown dwarfs, like all stars, create their own light. Brown dwarfs glow in the red and infrared spectrum until they sufficiently cool down, emitting X-rays and infrared light that scientists can measure.
What is the mass of a brown dwarf?
A value of greater than 80 Jupiter-masses is the lower limit for burning normal hydrogen – the process by which stars are able to shine – and therefore for enabling an object to qualify as a full-fledged star. Thus a brown dwarf is typically defined as any body lying in the mass range of 13 and 80 Jupiter-masses.
How does a blue giant star die?
The Death of Blue Supergiants As we mentioned above, supergiants will eventually die as supernovae. When they do, the final stage of their evolution can be as a neutron star (pulsar) or black hole. Supernova explosions also leave behind beautiful clouds of gas and dust, called supernova remnants.
What is the lifespan of a blue giant star?
Because they’re so large, and burn so hot, they use up their fuel very quickly. A middle-sized star like our Sun might last for 12 billion years, while a blue supergiant will detonate with a few hundred million years.
What would a blue sun do to a human?
No. It would make regular humans dead. A blue star radiates most of it’s energy in the ultraviolet end of the spectrum. Light in those frequencies have a terrible tendency to give ordinary humans cancer and radiation poisoning.
How long does a star take to burn out?
Generally, the more massive the star, the faster it burns up its fuel supply, and the shorter its life. The most massive stars can burn out and explode in a supernova after only a few million years of fusion. A star with a mass like the Sun, on the other hand, can continue fusing hydrogen for about 10 billion years.
What do you call a star that burns out?
The brilliant point of light is the explosion of a star that has reached the end of its life, otherwise known as a supernova. Supernovae can briefly outshine entire galaxies and radiate more energy than our sun will in its entire lifetime. They’re also the primary source of heavy elements in the universe.
What is the average life of a star?
about 10 billion years
What happens to a star when they die?
Stars die because they exhaust their nuclear fuel. Really massive stars use up their hydrogen fuel quickly, but are hot enough to fuse heavier elements such as helium and carbon. Once there is no fuel left, the star collapses and the outer layers explode as a ‘supernova’.