On Lunar and Solar tides: a few informative tweets by Neil deGrasse Tyson (or: Why the hell do we have higher tides during a full moon?! It makes no sense!)

  1. While we’re on the subject: The Moon’s capacity to raise tides on Earth is no greater when Full than at any other phase.
  2. The tides during Full (and New) Moon are highest **only** because that’s when the Sun’s tides add directly to them.
  3. During half-moons (1st & 3rd quarter), the Lunar & Solar tides add out of phase, partly canceling one another.
  4. The Sun’s tides are only about 1/3 that of the Moon’s, so even during the canceling quarter phases, some Moon-tide remains.
  5. And not to disturb anybody, but Tides cause friction between Earth’s crust and the sloshing oceans, slowing down our rotation.
  6. Not only is Earth’s rotation slowly slowing down, but the Moon’s orbit is spiraling away from us by about 2-inches per year.