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From the March 2011 issue

Ask Astro web extra: How many stars are there within 33 light-years of our solar system?

Associate Editor Liz Kruesi
By Astronomy Staff | Published: March 28, 2011 | Last updated on May 18, 2023

Up Next

  • A Hubble Space Telescope image of Sirius A, the brightest star in the night sky, appearing as an intensely bright white-blue point of light with four prominent diffraction spikes extending diagonally across the dark blue background. Sirius B, its much fainter white dwarf companion, is visible as a small distinct point of light in the lower left of the frame.
    Observing, Science, Stars

    Which naked-eye star is richest in metals?

  • A richly detailed telescope image of a star-forming nebula, filled with swirling clouds of blue, orange, and pink gas and dust. Dark pillars of dense dust cut through the center of the image, surrounded by glowing nebular material and hundreds of orange and yellow stars scattered throughout. A bright cluster of young stars illuminates the lower right portion of the image, casting a warm glow against the surrounding gas clouds.
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    RCW 36: A bird of prey sails away

  • An artist's illustration of two stars against a dense, starry background with red and blue nebula clouds. A large, intensely bright white star dominates the left side of the image, while a smaller, vivid blue star glows to its right, suggesting a binary star system.
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    How can a young blue giant have a white dwarf companion star that’s billions of years older?

  • A James Webb Space Telescope deep field image showing hundreds of distant galaxies scattered across a black background in a range of shapes — spirals, ellipticals, and elongated streaks — in colors from white and blue to orange and red. A large, detailed barred spiral galaxy with a bright white core and faint blue spiral arms dominates the center-left of the frame. Several foreground stars display the distinctive six-pointed diffraction spikes characteristic of JWST imagery.
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    JWST studies a supernova near the dawn of time

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