ਫਰਮਾ:Portal:Physics/Did you know

• ...that if the galaxy Andromeda were bright enough to be fully visible to the naked eye it would appear six times as wide as our moon?

Mock mirage of the setting sun

• ...the mirage of astronomical objects is an optical phenomenon, which produces distorted or multiple images of astronomical objects such as the Sun, the Moon, the planets, bright stars and very bright comets

• ...that your watch would run slower when orbiting a black hole than it would on Earth?

• ...that Aristotle's ideas of physics held that because an object could not move without an immediate source of energy, arrows created a vacuum behind them that pushed them through the air.

• ...that nuclear fusion reactions are probably occurring at or above the sun's photosphere; it is a process called solar surface fusion.

• ...that, in the Large Hadron Collider, protons move at 99.9999991% of the speed of light when accelerated to the energy of 7 TeV?

• ...that, at a speed of 299,792,458 m/s, light can travel from the Earth to the Moon in 1.2 seconds?

• ...that the submarine telescope ANTARES, intended to detect neutrinos, may also be used to observe bioluminescent plankton and fish?

Artist's depiction of the WMAP satellite measuring the Cosmic Microwave Background Radiation to help scientists understand the Big Bang

• ...that lasers can be used to separate two isotopes very efficiently?

• ...that neutron stars are so dense that a teaspoonful (5 mL) would have ten times the mass of all human world population?

• ...that every year, the Moon moves 3.82 cm away from Earth?

• ...that gold leaf is about 500 atoms thick?

• ...that the Big Bang was secured as the best theory of origin of the universe by the discovery of the cosmic microwave background radiation in 1964?

• ...that Neptune was discovered by its gravitational pull on Uranus?

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