Table of Contents
Which object has smallest radius?
Mercury is the smallest planet with a radius of only 2,440 km at its equator. Mercury is not that much larger than the Moon, and it is actually smaller than some of our Solar System’s larger satellites, such as Titan.
Which of the following has the smallest radius astronomy?
The smallest known star right now is OGLE-TR-122b, a red dwarf star that’s part of a binary stellar system. This red dwarf the smallest star to ever have its radius accurately measured; 0.12 solar radii. This works out to be 167,000 km. That’s only 20% larger than Jupiter.
Which object has the largest radius?
Larger than 400 km Body Radius # (R/M) (km) Sun 695508 ± ? 1 Jupiter 69911±6 2 Saturn 58232±6 (136775 for main rings) 3.
How would a flashing red light appear as it falls into a black hole?
The black hole would quickly suck in the Earth. Viewed from a distance, how would a flashing red light appear as it fell into a black hole? It would appear to flash more quickly. Its flashes would appear bluer.
How big is a white dwarf quizlet?
What is a White Dwarf? Cannot be larger than 1.4M sun. – Electrons would have to travel faster than the speed of light to exceed this. – Electrons respond to compression by moving faster, which makes the degeneracy pressure strong enough to resist the greater force of gravity.
How big is a typical white dwarf quizlet?
Terms in this set (96) A typical white dwarf has a mass of about 1.0MSun and the radius of Earth (about 6400 kilometers). Calculate the average density of a white dwarf, in kilograms per cubic centimeter.
Which star is smallest?
Which is the smallest neutron star?
List of the smallest stars by star type Type Star name Radius Earth radii (Earth = 1) Red dwarf EBLM J0555-57Ab 9.41 Brown dwarf Cha 110913-773444 20.17 White dwarf GRW +70 8247 0.52 Neutron star PSR B0943+10 0.000407643.
What is in a white dwarf?
Usually, white dwarfs are composed of carbon and oxygen (CO white dwarf). If the mass of the progenitor is between 8 and 10.5 solar masses ( M ☉), the core temperature will be sufficient to fuse carbon but not neon, in which case an oxygen–neon–magnesium (ONeMg or ONe) white dwarf may form.
Where do gamma ray bursts come from?
So it seems that most gamma ray bursts originate in a narrow beam of intense radiation released during a supernova or hypernova as a rapidly rotating, high-mass star collapses to form a neutron star, quark star, or black hole.
What would happen if the sun become a black hole?
What if the Sun turned into a black hole? The Sun will never turn into a black hole because it is not massive enough to explode. Instead, the Sun will become a dense stellar remnant called a white dwarf.
Where do gamma ray bursts tend to come from where do gamma ray bursts tend to come from?
All gamma ray bursts are produced by supernovae. They occur in the same types of close binary systems that produce X-ray bursts. All those that we have detected occurred in distant galaxies.
Which is closest in size radius to a white dwarf?
A white dwarf is a star very dense: its mass is close to that of the Sun, while its radius is comparable to that of Earth. The volume of a white dwarf’s similar to the Earth. The luminosity or the radiant power emitted comes from the emission of stored thermal energy.
How is it possible for the smallest white dwarfs to be the most massive?
… packing a mass greater than that of our sun into a body about the size of our moon. It may seem counterintuitive, but smaller white dwarfs happen to be more massive. This is due to the fact that white dwarfs lack the nuclear burning that keep up normal stars against their own self-gravity…Jul 5, 2021.
Which star has the largest radius quizlet?
Antares is a red supergiant; its spectral type M means it is red, and its luminosity class I indicates a supergiant. Which star has the largest radius? Antares has the largest radius because it is the only supergiant on the list.
What is the typical radius of a white dwarf?
It follows that the radius of a typical solar mass white-dwarf is about 7000km: i.e., about the same as the radius of the Earth. The first white-dwarf to be discovered (in 1862) was the companion of Sirius.
What are the Novas?
A nova is an explosion from the surface of a white-dwarf star in a binary star system. A nova occurs when the white dwarf, which is the dense core of a once-normal star, “steals” gas from its nearby companion star. When enough gas builts up on the surface of the white dwarf it triggers an explosion.
Which object has greater mass a white dwarf or a neutron star?
A low or medium mass star (with mass less than about 8 times the mass of our Sun) will become a white dwarf. A typical white dwarf is about as massive as the Sun, yet only slightly bigger than the Earth. This makes white dwarfs one of the densest forms of matter, surpassed only by neutron stars and black holes.
What is the smallest planet?
Can you touch a star?
Surprisingly, yes, for some of them. Small, old stars can be at room temperature ex: WISE 1828+2650, so you could touch the surface without getting burned. Any star you can see in the sky with the naked eye, however, would be hot enough to destroy your body instantaneously if you came anywhere near them.
Is Jupiter a brown dwarf?
Gas giants have some of the characteristics of brown dwarfs. Like the Sun, Jupiter and Saturn are both made primarily of hydrogen and helium.
What is smaller than a white dwarf?
At the end of their life cycle, white dwarfs burn off all of their energy, and all that is left is a thick ball of carbon. These dead white dwarfs, called black dwarfs, are smaller than the white dwarf that birthed them.
What is the smallest white dwarf?
Just a smidge bigger than the moon, a newfound white dwarf is the smallest known example of these star carcasses. A white dwarf is the remnant left behind when certain stars peter out. They’ve lost a lot of their mass — and size. This one has a radius of only about 2,100 kilometers (1,305 miles).
What is smaller than a star?
Phillip E. From largest to smallest they are: Universe, galaxy, solar system, star, planet, moon and asteroid.
