April 16, 2019
The constellations may be old, but the person celebrating beneath them is gloriously new by cosmic standards.
In the Vicinity of the Cone Nebula
Birthday · April 16, 2019
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APOD published April 16, 2019. Credit: Utkarsh Mishra. A publication-date match, not a photo taken on your date. Independent of NASA.
Strange shapes and textures can be found in neighborhood of the Cone Nebula. The unusual shapes originate from fine interstellar dust reacting in complex ways with the energetic light and hot gas being expelled by the young stars. The brightest star on the right of the featured picture is S Mon, while the region just below it has been nicknamed the Fox Fur Nebula for its color and structure. The blue glow directly surrounding S Mon results from reflection, where neighboring dust reflects light from the bright star. The red glow that encompasses the whole region results not only from dust reflection but also emission from hydrogen gas ionized by starlight. S Mon is part of a young open cluster of stars named NGC 2264, located about 2500 light years away toward the constellation of the Unicorn (Monoceros). Even though it points right at S Mon, details of the origin of the mysterious geometric Cone Nebula, visible on the far left, remain a mystery.
Image credit: Utkarsh Mishra