The Giant Magellan Telescope's third primary mirror is cast inside a spinning furnace at the University of Arizona's Steward Observatory MIrror Lab on Aug. 24, 2013.

The Giant Magellan Telescope's third primary mirror is cast inside a spinning furnace at the University of Arizona's Steward Observatory MIrror Lab on Aug. 24, 2013.

Infant Stars _ This incredible image taken with NASA's Hubble Space Telescope depicts bright, blue, newly formed stars that are blowing a cavity in the center of a star-forming region in the Small Magellanic Cloud.

Infant Stars _ This incredible image taken with NASA's Hubble Space Telescope depicts bright, blue, newly formed stars that are blowing a cavity in the center of a star-forming region in the Small Magellanic Cloud.

Diagram showing orbit of near-Earth asteroid 2013 NE19, which passes close to Earth on July 22, 2013.

Diagram showing orbit of near-Earth asteroid 2013 NE19, which passes close to Earth on July 22, 2013.

Jupiter is the largest planet in Earth’s solar system and has 63 moons encircling it. The planet is a giant ball of gas and liquid.

Jupiter is the largest planet in Earth’s solar system and has 63 moons encircling it. The planet is a giant ball of gas and liquid.

The Whirlpool galaxy, M51, has been one of the most photogenic galaxies in amateur and professional astronomy. Easily photographed and viewed by smaller telescopes, this celestial beauty is studied extensively in a range of wavelengths by large ground- and space-based observatories.

The Whirlpool galaxy, M51, has been one of the most photogenic galaxies in amateur and professional astronomy. Easily photographed and viewed by smaller telescopes, this celestial beauty is studied extensively in a range of wavelengths by large ground- and space-based observatories.

Key word:  STARS.  Other than a handful of deep sky objects (galaxies, nebulas, star clusters) that can be seen w/ the naked eye, this statement is basically correct. The stars we can see do generally fit inside that circle. (See comments below.)

Key word: STARS. Other than a handful of deep sky objects (galaxies, nebulas, star clusters) that can be seen w/ the naked eye, this statement is basically correct. The stars we can see do generally fit inside that circle. (See comments below.)

Star Cluster Near Orion Nebula Revealed in Telescope Views ...  Credit: © CFHT/Coelum (J.-C. Cuillandre & G. Anselmi)A star cluster once thought to be part of the spectacular Orion Nebula is actually a separate celestial entity parked in front of the nebula, a new study reveals.

Star Cluster Near Orion Nebula Revealed in Telescope Views ... Credit: © CFHT/Coelum (J.-C. Cuillandre & G. Anselmi)A star cluster once thought to be part of the spectacular Orion Nebula is actually a separate celestial entity parked in front of the nebula, a new study reveals.

NGC 6751 in the constellation Aquila. The nebula is a cloud of gas ejected several thousand years ago from the star visible in its center.

NGC 6751 in the constellation Aquila. The nebula is a cloud of gas ejected several thousand years ago from the star visible in its center.

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