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Phil Plait: Gamma rays are the highest energy form of light.

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Dave Thompson: There's the light we see with our eyes, but their lots of other types of light. Gamma

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rays are the most energetic form of light, the most powerful.

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Valerie Connaughton: Gamma rays are the part of what we call the electromagnetic spectrum

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which starts in radio, at very long wavelengths, goes through optical,

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then through x-rays, and then gamma rays are the very highest energy form

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of that type of radiation. Neil Gehrels: The reason that it's important to look at the

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high-energy gamma rays is that many objects, the most violent

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and some of the most interesting objects in the universe emit most of their light

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in this high-energy gamma ray part. Phil Plait: And the only thing that can generate gamma rays

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are incredibly violent events, incredibly energetic events. And we're talking

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stars exploding and neutron stars with really strong magnetic

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fields and really exotic and strange objects like that. Isabelle Grenier: It's

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like a Christmas tree it's shining, and it's flaring and their are eruptions

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every day. Peter Michelson: Gamma-ray bursts being an example of something that, for a

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brief instant of time outshines the entire rest of the universe.

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Chip Meegan: These are the biggest explosions in the universe.

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