Ask a Physicist 7.2 Dark Matter & Dark Energy part 2

Second part of a video explaining the concepts of dark matter and dark energy, what they are and how we know they exist. This part addresses the motion of galaxies in galaxy clusters and micro lensing events, both of which evidence for dark matter. Further, the episode discusses the two possible canditaes for dark matter, namely MACHOS and WIMPS.

For further reading see:
In Search of DARK MATTER by Ken Freeman and Geoff McNamara

Fritz Zwicky's original paper on dark matter:
http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1937ApJ....86..217Z

More on gravitational lensing:
http://www.youtube.com/watch?v=oSZz-pru9aU&feature=related

Pictures and music:
http://new.us.music.yahoo.com/par-lindh/tracks/song-of-the-dwarfs-including-w...
http://chandra.harvard.edu/photo/2003/apm08279/more.html
http://apod.nasa.gov/apod/ap040627.html
http://www.spacetoday.org/images/Hubble/HubbleBeauty/NGC7742SpiralGalaxyNASA.jpg
http://imgsrc.hubblesite.org/hu/db/2003/01/images/a/formats/full_jpg.jpg
http://antwrp.gsfc.nasa.gov/apod/image/0702/abellclust_hst_lr720.jpg

Category:

Education

Tags:

• dark matter
• dark energy
• galaxies
• galaxy clusters
• einstein
• newton
• gravitational lensing
• micro lensing
• WIMPS
• MACHOS

[leahcimrac]

I love your accent buddy. Where do you originate from before England?

[ASKaPHYSICIST]

@leahcimrac I'm German buddy.

[leahcimrac]

@ASKaPHYSICIST Your studying in England though right?

[ASKaPHYSICIST]

@leahcimrac that's right yes. 

[leahcimrac]

Why isn't there anti Gravity? If gravity is in the presence of matter then maybe a lack of matter would create an anti gravity effect.

[ASKaPHYSICIST]

@leahcimrac that's like saying a lack of charge should be anti charge. When we know that in fact anti matter has 'anti' or rather negative charge. Gravity is the result of the curvature of space time and space time in the absence of matter is flat.

[gaynorglowellxsingh]

CERN is a reversed engineered black hole. Plasma is created in black holes as matter is accelerated to almost the speed of light as it falls into it. Is it possible that dark matter and dark energy is the byproduct of the mass that falls into black holes as a quantum soup in a Bose- Einstein condensate, and was released back into our universe during the big bang.

(for more info see video)

[tmierdna]

@neveranythingtodoXD They should at least be working on it, and make sure the new Telescope or however will be called will be considering the majority of studies conducted so far, as to filter out most of the irrelevant information (due to Gravitational Lensing Event, etc) and just present a picture as close to reality as we can get.. Also a 3D view of the known universe would be nice to be put up together or even better a 3D motion simulation based on the data gathered so far.

[tmierdna]

@ASKaPHYSICIST thanks, looking forward to it :)

[neveranythingtodoXD]

@tmierdna Very true, and i thank you for replying to my comments, as others wouldn't (SixtySymbols, ect..) But don't you think that seeing how fast technology is going already, that people would be able to think of a way to build something that has a greater ability to view objects farther away, and possibly see what their trajectory would be? And possibly prove my theory right, or wrong...