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    Dr. Frank Summers of explains what the Crab Nebula can tell us about massive stars exploding in the night sky using multiwavelength astronomy TONIGHT at 8 p.m. EST:

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  2. In April, Hubble will mark its 30th anniversary 🎈. After 5 servicing missions, it’s only gotten better! Left is one of the first Hubble images of Jupiter ever processed. At right is a more recent photo taken using Wide Field Camera 3 in 2019. Credit: NASA/ESA

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  3. What does it smell like in space? It could be burnt meat or spent gunpowder—it depends on what is measured. Polycyclic aromatic hydrocarbons, molecules that are byproducts of dying stars, are the source. Credit:

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    30. sij

    The clear winter sky beckons: Learn how to spot blue-white Rigel and star cluster M41. Watch “Tonight’s Sky” to learn about this month’s constellations and find inspiring space-based views. Set a time to admire the sky from your backyard or front stoop!

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    29. sij

    The Crab Nebula is a remnant of a star that raged against the dying of the light in a titanic supernova explosion! Join a free talk by Dr. Frank Summers of Tuesday, February 4 at 8 p.m. EST, to learn more:

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  6. Behold: One of the coldest places in the universe! The Boomerang Nebula is just one degree above absolute zero—colder than the cosmic microwave background. Brr! Image credit:

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  7. These ethereal wisps are part of the Veil Nebula, a remnant that remains visible thousands of years after the star exploded. Can a supernova’s light outshine a galaxy’s? Find the answer and learn about the processes at work:

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  8. Don’t be fooled: This pair of galaxies isn’t actually colliding. They’re millions of light-years apart, and appear close due to a chance alignment from our point of view. Learn more about NGC 3314:

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  9. Superlatives abound in and around M15! It is one of the densest globular star clusters ever discovered, the first known to host a planetary nebula, and it hosts a rare type of black hole. Keep reading:

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    18. sij

    . Or am taking this hashtag too literally?

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    17. sij

    Compare the Eagle Nebula’s famous Pillars of Creation in different wavelengths of light with our new interactive! Shift from visible to infrared to X-ray light and explore your universe:

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    16. sij

    : How are stars formed? This question has intrigued humankind for centuries. Watch as Dr. Nimisha Kumari of shares what we know about star formation:

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  13. Care for a dance? These two spirited spirals, part of the Arp 274 system, appear to be swooping around each other. Two bright foreground stars are photobombing the cosmic scene. Credit:

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  14. proslijedio/la je Tweet
    14. sij

    Ever wonder about how stars ⭐ form? Join us for a free talk about what astronomers know (and don’t know) about star formation TONIGHT at 8 p.m. EST with Dr. Nimisha Kumari of :

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  15. The Illuminated Universe blog celebrates , the planet that has inspired both backyard and professional astronomers for generations. Hubble images catalog the planet from 1996 (lower left) to 2000 (upper right):

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  16. It’s answer time! What causes the cross pattern around bright stars? A+ to those who said these are diffraction spikes caused by light interacting with support structures in the telescope. Explore the full image:

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  17. It’s answer time! What causes the cross pattern around bright stars? A+ to those who said these are diffraction spikes caused by light interacting with support structures in the telescope. Explore the full image:

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  18. Breaking: Astronomers using Hubble have made the most precise measurement yet of the universe’s expansion rate using the gravitational lensing method, which is independent from the usual cosmic distance ladder:

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  19. It’s time! What causes the cross-shaped pattern radiating from the bright bluish star in the lower right of this Hubble image? Respond in the comments and check back tomorrow for the answer. Credit: NASA, ESA, J. Lotz &HFF Team (STScI).

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  20. Using Hubble and a new observing technique, astronomers have uncovered the smallest clumps of dark matter ever detected. Dark matter is an invisible substance that makes up most of the universe’s mass & forms the scaffolding upon which galaxies are built:

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