Tips for Relieving Muscle Soreness. Use these tips the next time a workout has your muscles aching for relief. Nothing's quite as rewarding after a tough sweat session like sore musclesâexcept maybe larger, more defined muscles (but that's a story for another time). What you're feeling anywhere from 12-48 hours after a workout is something specialists refer to as DOMS, or Delayed Onset Muscle Soreness.
Thankfully, Copernicus set the record straight with his heliocentric model, and we now know that the Earth spins on its axis as it revolves around the sun. But why does our planet spin in the first place? Remember Newton's first law of motion? It states that an object remains in whatever state of motion it's in unless another force acts upon it. The Earth is rotating because it's been doing that as long as it has existed. Keep Reading Below Before there were planets in our solar system, there was a spinning, nebulous cloud of dust with our sun at the center.
Most people know that the Earth revolves around the Sun in one year (actually. 365.24 days and we add one day to the calendar every four years, for a âleap. yearâ). Most also know that it takes 24 hours (actually 23 hours and 56 minutes) for the Earth to make a full rotation on its axis. Fewer people know that the Earthâs orbit is elliptical, or oval shaped, and that the Earth is sometimes slightly closer to the Sun than at other times, but this is not what causes the seasons, in fact we are closest to the Sun in January! Seasons are caused by the fact that the âEarth is tiltedâ (see Figure 1). What we mean by that is that the Earthâs axial tilt is at an angle of 23.5 degrees relative to the plane of the Ecliptic, its plane of orbit around the Sun. And the imaginary line, on which the Earth rotates, its axis, is tilted close to Polaris, the North Star.