The Heavens - Nebulas, Quasars, Norther Lights, and other delights

Paco Dennis

Member
Location
Mid-Missouri
Eagle Nebula


 

Paco Dennis

Member
Location
Mid-Missouri
An international team of astronomers has discovered the second most distant quasar ever found. Named Pōniuā`ena and designated J100758.264+211529.207 (J1007+2115), the object is around 13.1 billion light-years away, and contains a huge black hole with the mass equivalent to about 1.5 billion Suns, about twice as massive as that in the most distant known quasar ULAS J134208.10+092838.61. The existence of such a massive black hole just 700 million years after the Big Bang significantly challenges models of the growth of the earliest supermassive black holes.

 

Paco Dennis

Member
Location
Mid-Missouri

The North Star: Polaris​


  • Constellation: Ursa Minor
  • Star Type: F-Class Supergiant
  • Mass: 4.5 times the mass of the Sun
  • Luminosity: 2,500 times brighter than the Sun
  • Diameter: 70 million km (50 x the Sun)
  • Temperature: 5,700 Celcius
  • Distance From Earth: 430 light-years
  • Rotation Period: 119 days
  • Alternate Names: Polaris A, Alpha Ursae Minoris, Pole Star, North Star
 

Aunt Marg

Granny Pantie Power!

The North Star: Polaris​


  • Constellation: Ursa Minor
  • Star Type: F-Class Supergiant
  • Mass: 4.5 times the mass of the Sun
  • Luminosity: 2,500 times brighter than the Sun
  • Diameter: 70 million km (50 x the Sun)
  • Temperature: 5,700 Celcius
  • Distance From Earth: 430 light-years
  • Rotation Period: 119 days
  • Alternate Names: Polaris A, Alpha Ursae Minoris, Pole Star, North Star
Do you know what amazes me, Paco?

Light years. It's just so hard to fathom how far away (distance wise) one light year is, need alone dozens or hundreds of light years.

One light-year is approx. 9 trillion km (6 trillion miles).
 

Paco Dennis

Member
Location
Mid-Missouri
I love to journey in my mind far from Earth...even to the "edge" of our universe sometimes. I find doing this puts so much of the melodrama we humans make in perspective. How very small we are in the BIG picture. :)

Our home Galaxy, The Milky Way, 100,000 light years diameter!

 

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