Home Remedies for Whiter Teeth. Some people still prefer the age-old home remedy of baking soda and a toothbrush to gently whiten teeth at home. Also, some foods such as celery, apples, pears, and carrots trigger lots of saliva, which helps wash away food debris on your teeth.
Roche limit. n. The smallest distance at which a natural satellite can orbit a celestial body without being torn apart by the larger body's gravitational force. The distance depends on the densities of the two bodies and the orbit of the satellite.
Roche limit, Hill sphere and radius of the planet [edit]. Consider a planet with a density of and a radius of, orbiting a star with a mass of M in a distant of R, Let's place the planet on its Roche limit: Hill sphere of the planet here is around L1(or L2): , Hill sphere ..........(4). see Hill sphere, or Roche lobe.