If the earth revolves each day, 27,000 miles around the equater, how come our hair isn't blown off our heads?
413242
The earth revolves around its axis and the reason we don’t feel it is because we live inside a bubble called the atmosphere and we’re moving along with it. It’s kinda like you in a car… you don’t feel your seat or CD case moving but they are.
364074
It's not so much that it's the time for the Earth to rotate as that is pretty constant, but that somebody somewhere (probably something to do with how many times a monk needed to pray each day) split the day into equal parts.\n\nThere are actually many hypohesis, the number of bones in your fingers, using the thumb as a pointing device, factors of 360 degrees.\n\nThere was actually a move to go decimal a number of years ago, 10 hours a day, each hour with 100 mins and 100 seconds
195652
the earth is a oblate spheroid....we do not fall to the edges because of the gravitational pull...
1001671
So earth will complete a complete rotation on its axis in 6 hrs instead of 24 hrs. So we have on average 3 hrs days & nights.It will also affect the distance of earth from sun. In nutshell the life on earth will be in danger.
540447
Let's just talk about Earth. The earth's diameter is 12756 km. Its circumference is pi x 12756 = 40074 km. The earth spins 1 round in 24 hours. That's 1700 km/h, or 472 m/s. If it rotates in an OPPOSITE direction, it's like the Earth is rotating at 944 km/s and suddenly stops. What happens? You fly through the air at 944 km/s. All the houses fly through the air at 944 km/s. Whole forests fly at 944 km/s. Even whole mountain ranges and mountain tips fly at 944 km/s. The ocean's waters fly backward at 944 km/s. Talk about a uber tsunami. I don't know what the friction of air against these object would do to them. Can anyone solve that? Even the Earth's crust might become detached with its outer mantle, I think. Lava breaks out everywhere, global earthquakes... In short: All hell breaks loose. Man, that's even worse than the Death Star. Superman actually does that to Earth in one of his movies. He's a major nut!
189981
The sun does attract the earth quite a bit. That's what keeps the earth orbiting it instead of flying off into space.
975517
Every time zone is 1 hour apart\nbecause the earth is round
351775
People knew the Earth was round for as long as there were sailors; it's a common myth that they thought they'd fall off the edge of the world when sea-fairing folks could easily see ships slowly descend over the horizon rather than suddenly just plain vanishing.\n\nIt's really just a straw man arguement that's really taken on a life of its own. Don't buy into it, even if our educational system even falls for it on Christopher Columbus day. *L*
370975
no one can prove the sun revolves around the earth because the sun doesn't orbit the earth.  the following link may help. http://spaceplace.nasa.gov/en/kids/barycntr.shtml
916850
the earth rotational energy is calculated to be  2.58×10^29 J , thus 0.01 of this is 2.58*10^27J , and this enough for human needs for about  2580000000 years .\n\nand if we asume that the energy decrease the rotational energy by the same portion (0.01%) then the day length will decrease by 14.4 mins.
193168
Geosynchronous orbits are at an altitude of 40 thousand km.\n\n An observer in such an orbit will observe as follows. \n\nIf he makes one revolution per day (earth time) in his orbit around the earth in the direction of earth’s rotation, the earth will exhibit always its one side.\n\nIf he makes one revolution per day in the opposite direction of earth’s rotation, the earth exhibits its entire surface to the observer by rotating itself twice per day. Similarly, we on the Earth will view the observer two times for a period of 0.25 day moving from East to West.\n\n If he makes one revolution per day in the same direction of earth’s rotation, the earth exhibits its entire surface to the observer by rotating itself twice per day but in a direction opposite to the previous one. Similarly, we on the Earth will view the observer two times for a period of 0.25 day moving from West to East.\n\n Instead of speed I am referring revolution per day because it is directly proportional to the revolution per day when the distance from the center of earth is fixed.\n\nIn the so called lower Earth orbits (up to 1400 km) there are 8000 satellites which are about 10 cm long   orbiting now around our earth with various speed and various directions. Some of them revolve the earth once in one hour.\n\nI am answering for unasked questions because just to reveal the fact that there are objects revolving around our earth with various speeds (more than the earth’s rotational speed) in various directions.
199932
The earth's rotation.
520978
Because it's not a solid body, different areas of the Sun rotate at different speeds.\n\nEQUATOR - 25 days per revolution\nPOLES   - 36 days per revolution\n30-degrees above/below equator - 28 days
1125779
The earth rotates around the sun on an elliptical course at an axis of 23 degrees.  As the northern or southern hemisphere gets closer or further from the sun the amount of light hitting it changes making the seasons.\n\nCombine the axial tilt and the ellipitical path and you create periods of warmth (spring and summer) and periods of cold (fall and winter).\n\nThe primary property is the earth’s 23 degree tilt.  The axial tilt remains fixed as the earth rotates.  When the earth’s axis is turned away from the sun less light falls on that side of the earth and it gets colder.  When the axial tilt is closer to the sun then more light falls upon the earth making it warmer.  This also explains the length of the days.  The earth’s rotational speed doesn’t change, but one hemisphere is tilted closer to the sun so their day is longer.\n\nThen there is the orbital path.  When part of the earth is farther from the sun it gets colder, as it gets closer it gets warmer.  As the earth rotates around the sun it gets closer and further from the sun so the temperature varies.  This is because of the orbital path the earth takes around the sun.  It is not a circular path because to orbit in a true circular path you need to be in a perfectly balanced orbital position with the speed of travel just matching and canceling the attraction of the object.  Satellites in Geo-stationary orbits around the earth are on such a path (since this point matches the speed of the earth’s rotation the satellite is in a fixed position relative to the earth), no planet is in such a position around the sun.  As the earth rotates it gets closer to the sun (and its speed increases, because the sun’s gravity is tugging on it), as the earth goes around the sun it reaches a point where it is closer than at any other point (perihelion), so the earth’s surface gets warmer.  As the earth continues around the sun it slows down, because the sun’s gravity is still tugging on it.  But, since it has accelerated it has a higher velocity so it can travel farther from the sun.  When it reaches its maximum distance (aphelion) the earth is colder.  At this distance it’s speed (velocity) is zero.  The sun is still tugging on the earth so it falls in toward the sun and accelerates, continuing on its orbital path.\n\nSounds real tricky doesn’t it, but counting all the asteriods, planets, and comets over a billion objects rotate around the sun on similar paths and they all have season.
559917
First, the speed of the rotation of the earth relative to where you are on the earth.  At the equator, the circumference of the Earth is roughly 24000 miles.  This is convenient, because the Earth rotates about its axis once every 24 hours.  Therefore an hour = 1000 miles of equatorial rotation.  Understand the fastest moving part of the Earth is the equator, since an object on the equator travels 24000 around the earth's Axis every day.  If you are closer to the poles, you are on a "thinner" slice of the earth, where the circumferene may only be 20000miles.  In that case you are moving at 833 miles per hour.  The fact that the Earth moves faster at the Equator than at the poles is responsible for the Coriolus Effect which is really important to people who study meteorology, or who wonder why their toilets get all swirly when flushed.  Why we don't "feel" the rotation is, simply put, because we are rotating exactly the same way as the earth.  In physics, this is called a "frame of reference".  For most intents and purposes, the earth is at "rest" relative to us.  As a human, you make up part of the mass of the earth, and you spin with it in a constant rotation.  It's only when we look to things that are not directly connected to the earth that we really see the effects of it's rotation (ie Tides of water, moments of clouds and weather, etc. . .)  Hope that helps.
338602
There are a number of observations that prove Earth moves around the Sun. Astronomers have found that relatively nearby stars appear to move horizontally back and forth slightly over a year's time. This effect is due to a phenomenon called parallax which in turn results from Earth's movement around the Sun. Also Earth's measured movement through the cosmic microwave background radiation is consistent with our orbit around the Sun.\n\nThis website has a more complete discussion about proofs of Earth's orbit around the Sun --\n\nhttp://curious.astro.cornell.edu/question.php?number=190
209222
no\ntime is a man made thing, to quantify a distance we travel in the grand scheme of things\nexample: we use 24 hours for a day. had i been involved in the creation of this, we would have 273 gronks in one turewion, which would be equal to our current day. a day is logically based on one rotation of the earth, and a year a spin around the sun, so a turewion would equal a day, a fioreter would equal a year, but a month would not exist, nor a week\n\nlampoilman - thats pretty deep, got any 'cid left