Stars on the Main Sequence that are hotter than the Sun are also larger than the Sun. So hot blue stars are more luminous (and therefore appear higher in this diagram) for two reasons: they are hotter, and hot objects are more luminous than cool objects, but they are also larger.

Most stars in the solar neighborhood are fainter and cooler than the Sun. There are also a handful of stars which are red and very bright (called red supergiants) and a few stars that are hot, but very faint (called white dwarfs).

The correct answer to the question above would be the event horizon. The event horizon is the area beyond a black hole, where the black hole has stopped expanding and matter will no long be pulled in.

What is the relationship between luminosity and temperature for stars on the Main Sequence? The brighter it is, the hotter it becomes.

There are 3 main regions (or evolutionary stages) of the HR diagram:

• The main sequence stretching from the upper left (hot, luminous stars) to the bottom right (cool, faint stars) dominates the HR diagram.
• red giant and supergiant stars (luminosity classes I through III) occupy the region above the main sequence.

White stars are hotter than red and yellow. Blue stars are the hottest stars of all.

red

Magnetar

• A magnetar is a type of neutron star believed to have an extremely powerful magnetic field (∼109 to 1011 T, ∼1013 to 1015 G).
• Like other neutron stars, magnetars are around 20 kilometres (12 mi) in diameter and have a mass about 1.4 solar masses.

Answer: The largest known star (in terms of mass and brightness) is called the Pistol Star. It is believed to be 100 times as massive as our Sun, and 10,000,000 times as bright! In 1990, a star named the Pistol Star was known to lie at the center of the Pistol Nebula in the Milky Way Galaxy.

Smallest stars by type The red dwarf stars are considered the smallest stars known, and representative of the smallest star possible. Brown dwarfs are not massive enough to build up the pressure in the central regions to allow nuclear fusion of hydrogen into helium.

The smallest star ever recorded — one about the size of Saturn — has been discovered by a team of astronomers, according to a study released Tuesday. With the unwieldy name of EBLM J0555-57Ab, the star is located some 600 light-years away in our Milky Way galaxy.

The biggest stars in the Universe are the monster red hypergiants, measuring up to 1,500 times the size of the Sun. But what are the smallest stars in the Universe? The smallest stars around are the tiny red dwarfs. These are stars with 50% the mass of the Sun and smaller.

Methuselah Star

Small, but Significant: A red dwarf, which is the smallest classification star we have, is the most abundant type of star in the Milky Way. It’s estimated that about 75% of our galaxy’s stars are red dwarfs.

The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.

For low-mass stars (left hand side), after the helium has fused into carbon, the core collapses again. As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. The core remains as a white dwarf and eventually cools to become a black dwarf.

Scientists using a new telescope found the size of the North Star, also known as Polaris. It turns out that Polaris is 46 times larger than the Sun. Cepheids are known to be much larger than normal stars like the Sun. Polaris is one of the most famous stars in our night sky.

Polaris gained its reputation as the North Star due to its location in the night sky, which is aligned with the direction of Earth’s axis. Polaris is actually one of at least three stars in a single system. The star is about 4,000 times as bright as the sun.

The North Star or Pole Star – aka Polaris – is famous for holding nearly still in our sky while the entire northern sky moves around it. That’s because it’s located nearly at the north celestial pole, the point around which the entire northern sky turns. Polaris marks the way due north.

Polaris, the North Star, appears stationary in the sky because it is positioned close to the line of Earth’s axis projected into space. As such, it is the only bright star whose position relative to a rotating Earth does not change. All other stars appear to move opposite to the Earth’s rotation beneath them.

The reason the North Star is so important for natural navigation is that it sits directly over the North Pole. Wherever you are in the northern hemisphere, the North Star will be the same angle above the horizon as your latitude.

RIGHT IS OF NO SEX