Copernicus | StarDate Online - Stardate.org

Copernicus | StarDate Online - Stardate.org
The blanket of air that surrounds Earth screens out some harmful forms of radiation, including ultraviolet and X-rays. That’s good for life, but bad for astronomy. It means that objects that produce those forms of energy are invisible. Yet those objects are s…
The blanket of air that surrounds Earth screens out some harmful forms of radiation, including ultraviolet and X-rays. Thats good for life, but bad for astronomy. It means that objects that produce t… [+1221 chars] Read More



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