In Natural Science
- Halo (optical phenomenon), an atmospheric light effect produced by ice crystals
- Galactic halo
- Halo nucleus
- Halo orbit
- Halo- (disambiguation), a chemical prefix
Read more about this topic: Halo
Famous quotes containing the words natural and/or science:
“Whenever there are in any country uncultivated lands and unemployed poor, it is clear that the laws of property have been so far extended as to violate natural right. The earth is given as a common stock for man to labor and live on.... The small landowners are the most precious part of a state.”
—Thomas Jefferson (1743–1826)
“There is a chasm between knowledge and ignorance which the arches of science can never span.”
—Henry David Thoreau (1817–1862)