3,000 Comets for SOHO

1. 0:00tone music Hi, I am Karl Battams. I am a computational scientist and astrophysicist from the Naval Research
2. 0:16Lab. Everything you are seeing in this movie is based on actual data, so actually, every single
3. 0:24dot that you see in this movie is a real comet that has been discovered or observed by SOHO. SOHO is
4. 0:32the Solar and Heliospheric Observatory, so it's a joint mission between NASA and the European Space Agency.
5. 0:40SOHO's mission was to study and understand the sun and the region of space surrounding the sun and all of
6. 0:49cool, awesome, explosive stuff that the sun does. There was never any intention for SOHO to be a comet discoverer
7. 1:01The reason SOHO has been so successful at finding these comets is because it has got this
8. 1:05wonderful instrument on the spacecraft that offers us a view of the inner solar system that we just cannot get from
9. 1:13any telescope on Earth. The different colors in this movie represent different families or populations of comets
10. 1:21that SOHO is observing. The red comets, these are Kreutz sungrazer. The green comets are
11. 1:29Maya group comets. The only exception is the yellow one
12. 1:33that you see. These are what we call non-group comets. These do not
13. 1:37belong to any family. You see as these objects
14. 1:41are flying in toward the sun, they are not really going in a straight line, they are following a curve.
15. 1:45That curve is because of the sun's gravity.
16. 1:49The closer a comet gets to the sun, the faster
17. 1:53it goes, and then they slow down again as they move away from the sun.
18. 1:57One of the really awesome facts that I love
19. 2:01about the sungrazers, in particular the Kreutz comets that you are seeing in red, they are the fastest object
20. 2:10in our solar system that aren't particles.
21. 2:14They get so close to the sun, that they are traveling at over 600 km/sec, that's not
22. 2:22.2% of the speed of light.
23. 2:26It is just an inconceiveable velocity for pretty much anything that's not particle, but for a big
24. 2:34house-sized chunk of rock and ice, it is truly insane that these objects are going
25. 2:38that fast. Unfortunately, they are getting completely fried in the process, but it is really awesome that they are doing that.
26. 2:46The comets that are flying around the sun and disappearing out of the movie
27. 2:50again, they have survived past the sun. They are not getting completely vaporized by the intense solar radiation.
28. 2:58Any comet that you see in this movie that does not have a label
29. 3:02it means it was discovered by SOHO. I really love this mission that was designed to do something
30. 3:10completely different, just by luck and by chance, it's completely rewritten the history books. More than
31. 3:18well over half of the comets we have on official record now carry SOHO's name, and it was never even intended
32. 3:26to do that. I just love that fact.
33. 3:30beeping

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