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Dr. Ludovic Ferrière’s Hunt for Impact Craters

2013-10_Ludovic Ferrière_Expedition to the Luizi impact crater-RDCongo

In our continuing reports on Asteroid Day organisers and events, today we are highlighting the work of Dr. Ludovic Ferrière. Ludovic currently works as curator of the rock collection and co-curator of the meteorite collection at the Natural History Museum Vienna in Austria. He became interested in various kinds of rocks at a young age and has since assembled a large collection of more than a 1,000 samples. Later on, at university, his passion for meteorite impact craters was born. A passion that drives his work (and travel destinations!) until today: The avid “impact craters hunter” managed to confirm 3 of the currently 189 recognised impact structures on Earth in the last few years.

Asteroid Day 2017

In the past years, Ludovic took part in different activities with the public at the Museum in Vienna, but this year he will be in Australia attending a meeting on meteorite craters in June, and, thus, won’t able to participate in the activities in Vienna. Nevertheless, he was involved in the planning and programme of this special day in the Museum. On the 30th June itself, he will be on his way to the Wolfe Creek crater in Western Australia.

Asked about why he personally supports Asteroid Day, his answer was simple. Fascinated by asteroids and their (past) collisions with Earth, he wants to get other people excited about this topic and educate the public about previous impacts. He believes it is really important to promote asteroids and especially to raise awareness of what they are, what risks they pose – not only in the past, as in the extinction of the dinosaurs, but also in the future – and what we can do about this. But he also stresses that asteroids can tell us a lot about the universe and that there is a lot to learn from those that have struck Earth in the past. And this is where his passion for impact craters kicks back in.

Fascination with Impact Craters

Naturally, I had to ask him about what fascinates him about impact craters in particular. “Impact craters are very unique geological features that can be seen on almost all the bodies of our solar system, but on Earth they are in most cases hard to spot due to erosion or vegetal cover.” So he hunts for them across the world, “as it is a mix between a Sherlock Holmes investigation and an Indiana Jones adventure. You need to go in the field and look for unusual rocks (e.g. shatter cones). Then back in the lab you have to look at the samples under the microscope to be able to find shocked minerals – the equivalent of DNA or blood in a criminal case with no murderer to be found but the traces of an asteroid…”. To Ludovic, impact craters are great destinations to travel to, reasons to discover remote places and question their origins. “And when you find something, it is fascinating to try to reconstruct the event. First its age, then how big it was, and the effects it had.”

Impact Crater Findings

Luizi Structure in the Congo © Ludovic Ferrière

So what can we learn from impact craters?
“A lot! On other planetary bodies they give us access to rocks that would otherwise not be visible, buried hundreds of kilometres below the surface. They are also used to estimate the age of planetary surfaces!” And in the case of Martian or Lunar meteorites on Earth – pieces of rocks that were ejected from Mars or our Moon following asteroid impacts, eventually landing on Earth as a meteorite of their own –  they “allow us to investigate these rocks for free, with no need for a sample-return mission. On Earth, we can better understand the behaviour of rocks and minerals exposed to high pressures and temperatures by looking at the rocks affected by impacts. They can be used to estimate risks associated with future impacts.

And when asked why he is planning on visiting the Wolfe Creek Crater in particular, Ludovic had a surprisingly simple answer: He was going to be in Australia for the conference mentioned above anyways, and the organisers are taking the participants there. And it’s not just the Wolfe Creek Crater. Ludovic is a man on a mission: “One of my dreams is to visit all impact craters and structures on Earth. In fact all impact craters are of interest as each one is different. The target rocks differ from crater to crater and thus the setting is different. Some are old, other were formed very recently. Different erosion states allow us to see deeper into the crater in some cases.”

Ludovic’s Challenge

Clearly, Ludovic Ferrière uses his passion as an inspiration for his travels around the globe. In fact, every two years, he celebrates his birthday (the 21st October in case you want to get him a present!) at a new impact he hasn’t visited previously. This tradition started in 2013 at the Luizi Crater in the Congo (a structure that Ludovic and his team helped confirm as impact crater in 2011!). In 2015, he spent his birthday at the Jebel Waqf as Suwwan in Jordan. As for the next stop in 2017, he doesn’t have concrete plans yet. But he wants to inspire others to travel to such structures, whether abroad or near to their home, and poses a challenge to fellow asteroid aficionados: Why not travel to one such crater for Asteroid Day on 30th June and send a selfie from the impact crater in to Asteroid Day Global?

As a fan of travel destinations off the beaten path, I can only support this initiative. So what are you waiting for? You have 38 days left to plan your very own crater trip! Send your best photo to and we’ll publish them right here for the world to see! And if you don’t know where to find the meteorite impact structure closest to you, Ludovic’s website has a useful map available. Go explore!

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Interview with Gerrit Kernbauer: Observing an impact on Jupiter

Gerrit Kernbauer with beer and telescope

Yesterday I had the opportunity to speak to Gerrit Kernbauer, the Austrian-born amateur astronomer who observed an impact on Jupiter a few days ago. Here it is. Enjoy! (You can read the original interview in German below).

How would you describe the astronomy community in Austria?
It’s a pretty large community. Austria is well located for astronomy thanks to the Alps mountains. But I am not very connected within the community.

Can you tell us a bit about yourself? How many years have you been observing and what would say were your personal highlights?
I am a CBC/CAD technician in the metal industry. I am currently out of work. I am 31 years old, live near Vienna, and have been observing the skies since the late ‘90s. My personal highlight was the solar eclipse on August 11, 1999, which we were able to observe amazingly here in Austria.

Area of the impact as observed 7 hours later.
For further details, read this article by Ricardo Hueso

What was it like when you realised what you just observed on Jupiter?
Before I made the discovery I was a bit disappointed by the video because the seeing wasn’t that great, that’s why I waited several days before analyzing the footage. I first discovered the light spot after I loaded the video into Autostakkert. I immediately thought of Shoemaker Levy 9 and then I uploaded the video onto YouTube and shared the video with the German speaking astronomy community which quickly confirmed my discovery.

Did you receive many media requests after you made the discovery?
Yes, I am slowly beginning to get quite a few international media requests 😉

Further commentary: I think it’s more likely to win the lottery than to make such a discovery. I am aware that it wasn’t particularly difficult to make this observation but I was unbelievably lucky. What’s particularly cool is that there was a second observation made by John Mckeon who also published the video.

Here is the video he uploaded to YouTube a few days ago:


We published two other articles on this observation. This article by Dr Mark Boslough, Chair of the Asteroid Day Expert Panel and this one by Ricardo Hueso.

Original Interview auf Deutsch:

Wie ist die Astronomie Community in Österreich?
Nun, ich denke es gibt eine recht große Astronomie Community in Österreich, nicht zuletzt wegen unserer günstigen Lichtbedingungen mit den Alpen. Ich bin aber ehrlich gesagt nicht all zu sehr vernetzt in dieser Gemeinschaft.
Ein wenig was über sich selbst: Was machen Sie beruflich, seit wie viel Jahren observieren sie? Was würden Sie sagen sind Ihre persönlichen Highlights? Vielleicht haben Sie Asteroiden entdeckt oder Planeten observiert?
Ich bin von Beruf CNC/CAD-Techniker in der Metallbranche, derzeit aber leider arbeitslos. Ich bin 31 Jahre alt, wohne in der Nähe von Wien und beobachte den Himmel, mit Pausen, seit Ende der 1990er Jahre. Mein bisheriges Highlight war die totale Sonnenfinsternis am 11. August 1999 die wir hier in Österreich hervorragend beobachten konnten.
Was war das fuer ein Gefühl als sie gemerkt haben was sie da beim Jupiter entdeckt haben? 
Ich war ursprünglich vor der Entdeckung etwas entäuscht da die Videos aufgrund des Seeings nicht so gut waren, deshalb habe ich auch einige Tage mit der Bearbeitung gewartet. Bemerkt habe ich den Lichtfleck erstmals als ich das Video in Autostakkert geladen hatte. Ich musste sofort an Shoemaker Levy 9 denken und habe das Video bei YT hochgeladen und in der Astrocommunity im deutschsprachigen Raum gezeigt wo ich schnell Bestätigung bekommen habe.
Haben Sie wegen dieser Entdeckung viele Medien Anfragen erhalten?
Ja, so langsam kommen immer mehr Anfragen aus der ganzen Welt 😉
Kommentar: Ich denke das ist unwahrscheinlicher als im Lotto zu gewinnen und so ist mir auch bewusst dass das keine besondere leistung von mir war sondern ich einfach nur unfassbares Glück hatte. Besonders cool finde ich dass noch ein zweites Video aufgetaucht ist, John Mckeon den Impact ebenso gefilmt und das Video veröffentlicht.
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