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Syrtis Major (center) is a prominent dark albedo feature on Mars.
Syrtis Major (center) is a prominent dark albedo feature on Mars.
Circumstellar debris disks as detected by the Hubble Space Telescope, and artist's impressions of the disks' orientations around their host stars
Circumstellar debris disks as detected by the Hubble Space Telescope, and artist's impressions of the disks' orientations around their host stars
A luminous red galaxy (LRG) acting as a gravitational lens, distorting the light from a much more distant blue galaxy into an Einstein ring
A luminous red galaxy (LRG) acting as a gravitational lens, distorting the light from a much more distant blue galaxy into an Einstein ring
The bright center of the Milky Way Galaxy is visible in dark skies on clear nights, in the direction of the constellation Sagittarius.
The bright center of the Milky Way Galaxy is visible in dark skies on clear nights, in the direction of the constellation Sagittarius.
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The Sun has an intrinsic luminosity of 3.83×1026 watts. In astronomy, this amount is equal to one solar luminosity, represented by the symbol L⊙. A st
The Sun has an intrinsic luminosity of 3.83×1026 watts. In astronomy, this amount is equal to one solar luminosity, represented by the symbol L⊙. A star with four times the radiative power of the Sun has a luminosity of 4 L⊙.