What is the oldest crown in the world?

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What is the oldest crown in the world?

The Crown of Princess Blanche

What are the seven churches today?

  • Ephesus.
  • Smyrna.
  • Pergamon.
  • Thyatira.
  • Sardis.
  • Philadelphia (modern Alaşehir)
  • Laodicea.

What’s the hottest planet in the universe?

Venus

Which star has highest surface temperature?

Type O stars have the highest surface temperatures and can be as hot as 30,000 Kelvins. On the other extreme, type M stars have the lowest surface temperatures and can be as cool as 3,000 K.

What star has the highest luminosity?

Sun

What type of visible star is the coolest?

A red dwarf is the smallest and coolest kind of star on the main sequence. Red dwarfs are by far the most common type of star in the Milky Way, at least in the neighborhood of the Sun, but because of their low luminosity, individual red dwarfs cannot be easily observed.

What is the most coolest star in the universe?

According to a new study, a star discovered 75 light-years away is no warmer than a freshly brewed cup of coffee. Dubbed CFBDSIR 1458 10b, the star is what’s called a brown dwarf.

What star do sailors use to navigate?

star Polaris

Does a supernova occur every time a star dies?

On average, a supernova will occur about once every 50 years in a galaxy the size of the Milky Way. Put another way, a star explodes every second or so somewhere in the universe, and some of those aren’t too far from Earth. But with the right amount of mass, a star can burn out in a fiery explosion.

What happens when a star starts to burn helium?

as the helium in the core is exhausted, the star begins helium burning in a shell around an inert carbon core while moving again up the H-R diagram to become a Red Supergiant.

What happens when all the hydrogen in a star is gone?

Eventually the core of the star runs out of hydrogen. When that happens, the star can no longer hold up against gravity. Its inner layers start to collapse, which squishes the core, increasing the pressure and temperature in the core of the star. At this point the star is called a red giant.