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What are tholins? The mysterious substance that turned Ultima Thule red

Wednesday, March 20th 2019 10:55 AM

On New Year’s Day, NASA’s New Horizons probe streaked by a tiny world dubbed MU69, or Ultima Thule, the farthest object humankind has studied up close. With most of the data still on the spacecraft waiting to be transmitted, scientists are still getting to know this distant body. We know that it’s composed of two chunks of rock loosely stuck together. We know tha...

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Supermoon, first day of spring are an astronomical doubleheader coming Wednesday

Tuesday, March 19th 2019 10:28 AM

We've got a doubleheader of astronomical action Wednesday: The spring equinox, which marks the beginning of spring, along with the final "supermoon" of the year.  Both will occur on Wednesday: The equinox at 5:58 p.m. EDT and the full moon/supermoon less than four hours later at 9:43 p.m. EDT, EarthSky reported. The equinox is the precise moment the sun's...

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How high-speed stars escape the galaxy

Friday, March 15th 2019 12:17 PM

Stars bob and weave in and out of the Milky Way Galaxy’s spiral arms like cars speeding through rush-hour traffic. But a snapshot of the nighttime sky makes it appear that these luminaries are as fixed as the great pyramids of Egypt. Of the estimated 200 billion to 400 billion stars that call our galaxy home, however, a tiny fraction of hot, massive ones stand out. Gravitational interact...

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A quasar-powered storm pours from the Teacup galaxy

Wednesday, March 20th 2019 10:57 AM

Your nighttime cup of chamomile might help you go to sleep, but this turbulent teacup is far from soothing.Sitting inside a galaxy known as the “Teacup,” nicknamed after its distinct silhouette, lies a storm that’s causing quite the stir. Powered by a supermassive black hole, astronomers thought the commotion inside this distant galaxy was rapidly dying down, but recent data...

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Ultima Thule answers – and raises – questions about early solar system

Tuesday, March 19th 2019 10:31 AM

The farthest object ever explored is slowly revealing its secrets, as scientists piece together the puzzles of Ultima Thule – the Kuiper Belt object NASA’s New Horizons spacecraft flew past on New Year’s Day, four billion miles from Earth. Analysing the data New Horizons has been sending home since the flyby of Ultima Thule (officially named 2014 MU69), mission scientists are le...

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The Sky This Week from March 15 to 24

Friday, March 15th 2019 12:19 PM

Friday, March 15The Big Dipper’s familiar shape rides high in the northeast on March evenings. The spring sky’s finest binocular double star marks the bend of the Dipper’s handle. Mizar shines at 2nd magnitude, some six times brighter than its 4th-magnitude companion, Alcor. Even though these two are not physically related, they make a fine sight through binoculars. (People wit...

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