ROV Meteorite HuntMarch 15 2017
On Monday, February 6, 2017, around 1:30 a.m. CST, a sonic boom shook residents of the Midwest as a bright green fireball streaked through the night sky. The sound was that of a meteor, nearly the size of a minivan, entering our atmosphere. After its fall to Earth, radar spotted the end of its journey over Lake Michigan, approximately 10 miles off the coast of Sheboygan, Wisconsin. Teen explorers from Chicago, led by scientists from the Adler Planetarium's Far Horizons program, The Shedd Aquarium, and The Field Museum, team up to take on this Underwater ROV Meteorite Hunt. Interested explorers wanted!Read background
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Our First Prototype Magnetic Meteorite Sled Test
Written by Jennifer Moore - Far Horizons Teen Intern
I am an eighteen year old incoming freshman at Southern Illinois University Carbondale, a recent graduate of Marist High School (but those days are behind me) and also a Far Horizons Teen Intern!
Today was our first day of testing the Magnetic Underwater Meteorite Sled (MUMS Jr.). We did three tests in different conditions, the first one in the sand, the second in the rocks, and the third in the water!
Before we did any testing we attached a 360 camera to see our progress while the sled was underwater. We also adjusted the height of our magnets using duct tape. All of these tests happened at 12th Street Beach, in Chicago, next to the Adler Planetarium.
Our model meteorites (which look somewhat like space pierogis) were slightly buried by the sand. This really hindered us, because our magnets couldn't pick them up. This will probably be similar to conditions in the lake. However, the magnet picked up lots of what we think is iron filaments and little magnetic rocks. This is something to take into account when we will be searching in the water... perhaps there is a way to clean this off.
The second test was slightly better than the first. We adjusted the magnet a second time, and the sled pulled far easier than it did in the sand. Hopefully the texture of the lake is more similar to the rocks. We only picked up one meteorites. (space pierogis) Another issue we faced was our sled would push rocks up and onto our magnet, which can be frustrating and possibly push off meteorites (space pierogis) our magnet.
Our final test occurred in the water, about one meter deep. The team all had to wear waders, which felt weird in the water. We had our 360 camera recording during this portion of the test! I (Jennifer Moore) pretended to be the boat and pulled it through the water. Once again, we did not pick up all five meteorites (space pierogis), however we picked up 3 of them! Also our MUMS (Magnetic Underwater Meteorite Sled) moved fairly easy while in the water!
We learned a lot to continue to modify our sled design. Overall I consider it a success!!!
Great Lakes Mapping Expedition with NOAA
UPDATE: We were grateful that NOAA Great Lakes invited us on board the RV/STORM this week off the coast of Manitowoc, Wisconsin to gain a deeper understanding of side scan sonar capabilities. They were on the last day of their two week long scanning mission for a proposed Marine Sanctuary
Unfortunately we weren't able to make it out to the strewn field, but we were able to get a solid sense of how the sonar reflects off of the various substrate on the lake bottom (check out the video below). We then went back over certain key areas that stood out in the side scan data to ground truth with a drop camera.
Materials that were used on this lake bed scanning mission: Side Scan Sonar Mapping Software - ArcView Drop Camera Temp/Salniity/Soundspeed Sensor
A broad mapping with side scan sonar won't detect each meteorite fragment, but it will give us a better idea of where we might be able to run a magnetic retrieval sled without running into rocks. We are interested in testing high resolution scans on smaller fields to understand how high of a resolution we can achieve. Once NOAA processes the data, it will not only be helpful to us, but for all scientists, as their are very few quality maps of the Lake Michigan lake bed!
20,000 Leagues Under the Stars
Chris Bresky Adler Planetarium / Far Horizons / Teen Programs Specialist
Yesterday was a great day for science! Adler Planetarium Teens joined with Shedd Aquarium Teens in the Shedd’s Teen Learning Lab to join The Deep Space Dive Team!
Shedd Senior Research Biologist, Philip Willink gave the teens an understanding of the lake ecology in the area of the meteorite strewn field, and the challenges that had to be overcome to design a magnetic sled capable of retrieving the metal rich meteorites. Deep Space Dive Teens then teamed up to brainstorm how to make Dr. Willink’s sled even better (see photos and video).
U of Chicago Grad Student Jennika Greer, currently working with the Meteoritics expert Dr. Philipp Heck of The Field Museum, gave the teens information of where the meteorite came from and what it was probably made of so teens could create meteorite simulants to be used in these scientist’s underwater detection/retrieval experiments. Jennika emphasized that, “this is a lot of brand new science that you are all a part of.” The teens were ecstatic that they were part of this expedition, and proud to be helping scientists in their search (watch the video recap below).
We'll be testing the first prototype of the magnetic sled tomorrow! Stay tuned!
We're picking up steam as we meet more and more interested scientists and science enthusiasts who are excited by our team's work. This kind of meteorite hunt has very little precedent so we are figuring out each step as we go! Nothing like building a plane while it's in flight!
Our team was able to video conference with NASA Scientist Marc Fries, he works in curation and has done a considerable amount of work calculating meteorite falls from weather radar. (Click the link to one of his papers below) He shared new radar readout images (see images below) that show the fragments caught by radar after the fireball.
Dr. Mark Hammergren, Adler Astronomer, is working on calibrating the videos from the meteor sightings and will be able to calculate where in our solar system the meteorite came from. This is exceptional as this will be one of about 18 meteors that has been able to be tracked to its source from video footage. Finding out the meteorite's point of origin will give us a better understanding of what the meteorite is made of.
Adler Teens have completed our first draft of our PVC underwater ROV and will begin experimenting with neutral buoyancy (see image). Next week we'll be engineering meteorite simulants with teens from the Shedd Aquarium to be used in our underwater detection/retrieval tests with sonar and magnetometers (see images of test meteorites).
We are all grateful for the journey thus far, the chance to teach hands on, applicable science, and collaborate with scientists across fields of study. What an adventure!
Check out Marc Fries' Paper Slightly Cloudy with a Chance of Chondrites
20,000 Leagues Under the Stars,
Far Horizons Adler Teen Programs Specialist
Exciting News from NASA Scientist - Marc Fries about our meteorite!
"I can confidently say that this meteorite fall was one of the largest in terms of total mass of the roughly two-dozen falls seen in RADAR imagery since 1998. "
We're deep in planning mode! Our "Deep Space Dive Team" scientists met recently to talk details about the hunt. Greg Regnier of Great Lakes Expeditions, along with Dr. Philip Willink, Senior Research Biologist at the Shedd Aquarium, described the capabilities of the underwater scanning equipment.(See Video)
Dr. Mark Hammergren, Astronomer at the Adler Planetarium, and Philipp R. Heck, Associate Curator of Meteoritics and Polar Studies at the Field Museum, brainstormed techniques to test the scanning equipment. They proposed engineering faux meteorite fragments, creating a strewn field underwater, and testing the readouts of the scanning equipment.
Adler Planetarium After School Hangout Teens have begun engineering a basic, PVC framed ROV, to understand the engineering skills, and underwater science needed, to perform an underwater meteorite expedition. (See Pictures)
We'll begin initial underwater tests this month and plan on joining the these Open Explorers in June to begin to understand the bottom of Lake Michigan in this area. Stay tuned for more updates soon and we'd love to have you all come along for the journey.
20,000 Leagues Under the Stars
- Chris Bresky Far Horizons Adler Planetarium Teen Programs
The Adler Planetarium's Far Horizons Program has one mission: bring real space exploration down to Earth and into the hands of students, volunteers, and the public. On Monday, February 6, 2017, around 1:30am CST, a bit of space literally came to Earth and splashed down in our own backyard! Enthused by the hands on science this brings teens of Chicago, and the ability to collaborate with scientists across fields, the planning for this expedition began.
All parties involved understand the difficulty of this task, the "needle in a haystack" odds of this endeavor, and it drives us all the more to challenge teens of Far Horizons to engineer innovative ways to find and retrieve these meteorites. The STEM Professionals that work and volunteer in the Far Horizons Lab offer our team of teens helpful insights with their design concepts. Astronomers from The Adler Planetarium, and founding members of Far Horizons, Dr. Mark Hammergren and Dr. Shane Larson, enrich our student's understanding of the space science that brought this meteorite to our own back door.Dr. Philipp R. Heck, meteoritics expert from The Field Museum, has given our team insight into the possible make up of these meteorites and ways to detect them. Marc Fries, a scientist from NASA, and a colleague of Dr. Philipp R. Heck, calculated the radar data from the meteorite's path and has created a map that predicts locations of the meteorites (and size distribution), which will prove crucial in our hunt. We are also consulting with the Senior Research Biologist of the Shedd Aquarium, Dr. Philip Willink, to understand the environment of the lake bottom. Dr. WIllink is interested in this expedition, not only for a chance to find hunks of rock from space, but also to capture data of the lake floor that have not been clearly mapped in the past.
In 2003, a similar sized meteorite landed in Chicago, many of the larger fragments were around the size of softballs. The image below crashed through a Chicagoans roof and landed in their laundry! Dr. Philipp R. Heck assumes, from the size and color of the fireball that we are dealing with a similar size and make up of the Park Forest Meteorite (image seen below, Adler Planetarium).
This spring we'll continue to consult with experts as we prepare for our Meteorite Hunt scheduled for the summer (July/August). Everyone involved has a lot to learn from each other as the task of underwater meteorite recovery is rarely undertaken. We look forward to sharing with the Open Explorer Community, build Far Horizon's first OpenROV (to explore Far Horizons of the deep!) and welcome all interested explorers in the Great Lakes region who have access to equipment to join the search. We'll learn a lot from this journey, and hope you will too.
Far Horizons Teen Programs Specialist Adler Planetarium