Why is a quasar so bright?

Why is a quasar so bright?

As the gas falls into the black hole, it is heated up to millions of degrees. The gas emits thermal radiation due to its enormous heat. This thermal radiation spans the spectrum, making the quasar bright in the visible spectrum as well as x-rays.

How big are quasars compared to galaxies?

Our own Milky Way galaxy, however, is 400 million light-hours across! For a quasar with an apparent size on a monthly scale, its maximum size would be several times that of our solar system, but far smaller than a galaxy.

How bright is a quasar?

Astronomers find the brightest quasar yet. It shines with a brightness equivalent to 600 trillion suns. “We don’t expect to find many quasars brighter than that in the whole observable universe,” said the astronomers.

How luminous are quasars?

Quasars have luminosities which lie in the range L = 10 to 100,000 LMW, where LMW is the luminosity of the Milky Way galaxy, which in turn is 25 billion times the luminosity of the Sun. Thus, even the dimmest of the quasars is far brighter than a big galaxy like our own.

What is the coldest natural temperature ever recorded on Earth?

The lowest natural temperature ever directly recorded at ground level on Earth is −89.2 °C (−128.6 °F; 184.0 K) at the Soviet Vostok Station in Antarctica on 21 July 1983 by ground measurements.

What’s the coldest habitable place on Earth?

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What is the warmest state in the United States?

Averaged through the year, Florida is the warmest state among the 50 states, and Hawaii ranks second-warmest. Third place goes to Louisiana and fourth to Texas, followed by Georgia, Mississippi, Alabama, South Carolina and Arkansas.

What is the coldest air temperature a human can survive?

The average body temperature is 98.6 degrees Fahrenheit. At an internal temperature of 95 degrees, humans can experience hypothermia, shivering and pale skin. At 86 degrees, they become unconscious and, at 77 degrees, cardiac arrest can occur. Most people cannot survive if their core temperature drops to 75 degrees.