Tag Archives: astronomy

Fireball spotted northwest of Chicago, February 6, 1:25 AM CST

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There was a very bright green fireball seen by hundreds of eyewitnesses surrounding Lake Michigan early this morning at 1:25:13 AM Central Time (February 6, 2017). The reports from these individuals and the video information from dash cameras and other cameras in the region indicate that the meteor originated 62 miles above West Bend, Wisconsin and moved northeast at about 38,000 miles per hour. It disrupted about 21 miles above Lake Michigan, approximately 9 miles east of the town of Newton. The explosive force of this disruption was recorded on an infrasound station in Manitoba, some 600 miles away – these data put the lower limit energy of the event at about 10 tons of TNT, which means we are dealing with a meteoroid – orbit indicates an asteroidal fragment – weighing at least 600 pounds and 2 feet in diameter. Doppler weather radar picked up fragments (meteorites) falling into Lake Michigan near the end point of the trajectory.
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Ground track and Doppler radar signature (done by Marc Fries at NASA Johnson Space Center); an animation of the orbit and approach of the meteoroid is being prepared and should be available soon. We will continue to look at data as it comes in and revise the calculations if necessary.

Links to videos of this event:

Lisle, IL Police Department
https://www.youtube.com/watch?v=cF0POBcZQRk

From Highway in Wisconsin:
https://twitter.com/KrazyPhukinFoo/status/828543708299657216
https://www.youtube.com/watch?v=-AozuKJZK_4

Chillicothe IL Police Department:
https://twitter.com/chillipd?ref_src=twsrc%5Etfw

Morton Grove Police Squad
https://twitter.com/NWSChicago/status/828532116300394496

Roof of Atmospheric, Oceanic & Space Sciences Building – University of Wisconsin https://www.youtube.com/watch?v=LHubXCtdEbo

EarthCams:

Looking over Lake Michigan, from Michigan Coast: (looking too north to see the meteor itself) http://www.earthcam.com/usa/michigan/grandhaven/lakemichigan/?cam=lakemichigan
Bright flash at 2:25:13

Bright Fireball Detected by 6 NASA All Sky Cameras

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http://youtu.be/wGE7OQSCkyA[/embedyt]

We have received numerous reports concerning a bright fireball that occurred over Georgia at 5:33:55 PM CST (6:33:55 PM EST). All 6 NASA all sky meteor cameras in the Southeast picked up the meteor at an altitude of 50 miles above the town of Georgia (SE of Atlanta). From its brightness, it is estimated that this piece of an asteroid weighed at least 150 pounds and was over 16 inches in  diameter. It entered the atmosphere at a steep angle and moved almost due south at a speed of 29,000 miles per hour. The NASA cameras tracked it to an altitude of 17 miles above the town of Locust Grove, where it had slowed to a speed of 9000 miles per hour, at which point the meteor ceased producing light by burning up. It is possible that fragments of this object survived to reach the ground as meteorites.

A more detailed analysis will be performed tomorrow and further details will follow if this analysis still indicates the possibility of a meteorite fall.

Ground track, still images from the cameras, and a movie from the NASA camera located in Cartersville, Georgia attached.

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Bright, Basketball Sized Meteor in Ontario

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Researchers from Western University have released footage of a basketball-sized meteor that was almost as bright as the full moon.

The meteor lit up the skies of southwestern Ontario last week. Astronomers are hoping to enlist the help of local residents in recovering one or more possible meteorites that may have crashed in the area just north of St. Thomas, Ontario.

Meteorites may best be recognized by their dark and scalloped exterior, and are usually denser than normal rock and will often attract a fridge magnet due to their metal content. In this fall, meteorites may be found in a small hole produced by their dropping into soil. Meteorites are not dangerous, but any recovered meteorites should be placed in a clean plastic bag or container and be handled as little as possible to preserve their scientific information.

More details can be found at  http://meteor.uwo.ca/research/fireball/events/st_thomas/overview.html

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 Credit: The University of Western Ontario

First Observations of the 2013 Eta Aquarids

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Despite interference from the moon and clouds (and rising sun!), this morning we snagged our first observations of the 2013 Eta Aquarids.  Here’s an image of one from the all sky camera in Tullahoma, Tennessee.  The Eta Aquarids peak in the pre-dawn hours on May 6 and are material from Halley’s comet.  They zoom around the solar system at speeds near 148,000 mph.  The one seen here burned up completely in our atmosphere over Nunnelly, Tennessee at a height of 58.7 miles above the ground.

(Credit: All Sky Camera Network)

Asteroid 2012 DA14 and the Eta Carinae Nebula

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This image shows asteroid 2012 DA14 and the Eta Carinae Nebula, with the white box highlighting the asteroid’s path. The image was taken using a 3″ refractor equipped with a color CCD camera. The telescope is located at the Siding Spring Observatory in Australia and is maintained and owned by iTelescope.net.

Image credit: NASA/MSFC/Aaron Kingery

 

Look For The Harvest Moon This Weekend

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Take a moment to gaze at the beautiful harvest moon this Saturday, September 29th.

(Image credit: NASA)

The harvest moon gets its name from agriculture. In the days before electric lights, farmers depended on bright moonlight to extend the workday beyond sunset. It was the only way they could gather their ripening crops in time for market. The full moon closest to the autumnal equinox became “the harvest moon,” and it was always a welcome sight.

Northern summer changed to fall last Saturday, Sept. 22nd, and is called the autumnal equinox. The word equinox comes from the Latin words for “equal night.” The fall and spring equinoxes are the only days of the year in which the Sun crosses the celestial equator.

Keep an eye on the moon as it creeps above the eastern skyline. The golden sphere may appear inflated. This is the moon illusion at work. This optical illusion is caused by the moon’s proximity to distant objects. A harvest moon inflated by the moon illusion is simply beautiful to us, but even more so to the farmers getting their crops in on those cool autumn evenings.

(Image credit: Stefano De Rosa)

Once in a Blue Moon

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Image credit: NASA/MSFC

On Aug. 31, if the night sky is clear, you will be able to see the second full moon of the month, which is called a “blue moon.”

You may have heard the expression, “once in a blue moon,” meaning “almost never,” because having 13 full moons in a calendar year — instead of the usual 12 — is rare.

Once in a blue moon, an individual who embodies the spirit of an explorer crosses the horizon in our culture. Such was Neil Armstrong. It is appropriate that the farewell to Armstrong coincides with the appearance of a blue moon.

A blue moon occurs just seven times every 19 years. The next blue moon will be on July 31, 2015.

Usually months have only one full moon, but occasionally a second one sneaks in. Full moons are separated by 29 days, while most months are 30 or 31 days long; so it is possible to fit two full moons in a single month. This happens, on average, every two and a half years.

So, as we say Godspeed to Mr. Armstrong, take a moment tonight to observe the blue moon, and give it a wink in honor of the first human to set foot on the surface of the moon.



From Athens to Tuscaloosa — In 3 Seconds!

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MSFC’s all sky meteor camera recorded this bright meteor last night (November 1st) at 9:04 pm CDT. Blazing across the sky at 40 miles per second (144,000 mph), the 1 inch visitor from space took only 3.3 seconds to go 132 miles, starting at a point just northeast of Athens, Alabama and burning up west of Tuscaloosa.

Now that’s moving!




 

 

Evaporated Comet

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A meteor and the barred spiral galaxy NGC-2903 grace the top of this October 14 image of an area of space near the head of the constellation Leo. The meteor and the galaxy were purely coincidental, as it is what is not visible in the image that is important. Two telescopes operated by astronomers at the Marshall Space Flight Center just stopped scanning the skies for Comet Elenin, which began fading and breaking apart back in August. Its close approach to the Sun on September 10 apparently caused the comet to disintegrate even further, into  objects so small they are unable to be seen by ground-based telescopes like the 20″ instrument which took this picture. An anticlimatic end to the so-called “Comet of Doom”, with only empty space to mark its close approach (22 million miles) to Earth.

 

By the way, the galaxy NGC-2903 is 30 million light years distant from our own Milky Way.



 

Photo credit: Rhiannon Blaauw, Rob Suggs

 

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