when will the planets aligne again?
146013
Next similar alignment: 2438\nRoughly speaking, the inner six planets are aligned every 50 to a 100 years or so, according to David R. Williams of NASA Goddard Space Flight Center.\n\nBut the configuration of these eight bodies is more of a rarity. They lined up in a somewhat similar fashion in 1962 and won't do so again until 2438, according to Don Yeomans and Steve Edberg of NASA's Jet Propulsion Laboratory.
998766
it depends. Will you be facing north or south on the planet's surface? Then figure out if your left hand is up, and the right is down, or vice versa. If it is, you can count on a retrograde rotation.
585173
If you pray and work very hard, you will find your situation improve.  The stars are coming into alignment in 2006 for Sagittarius.  This is the year you can turn everything around for yourself.  Don't give up now.
881564
Harmonic convergence is when all the planets in the solar system are aligned with one another. In harmony so to speak.
49542
Yes, but not for a few million years. It'll happen just about 8 minutes after the Sun goes Supernova. 8 minutes is the light year distance from earth. So, don't sweat things for now.
1045501
Conjunctions between Mars and Saturn occur once every two years.  The last one was on May 23, 2004. If the conjunction occurs when Mars is retrograde, a triple conjunction can take place within a period of a few weeks.\n\nAfter the upcoming M-S conjunction on June 17, the next three will occur on July 8, 2008; July 30, 2010; and August 14, 2012.
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.
457404
All the planets in our solar system rotate in the same direction with the exception of Venus which rotates *very* slowly in the opposite direction.  It was theorised that it once suffered a glancing blow from a very large object that reversed its spin.\n\nHmm - by rotate I mean on their own axis - not around the sun, in which case all planets go the same direction.
199932
The earth's rotation.
702586
Please refer to my previous Best Answers on this question.\n\n18 NOV 06, 0502 hrs, GMT.
57630
No.\n\nThe orbits are inclined slightly and I do not believe there is a place where they would all be *exacly* in a line.\n\nBut they get close together in the sky. The visible planets are within a couple of degrees every twenty or thirty years. (Holding your fist out will block about 10 degrees.) Such an alignment in the sky can last for a few days.
233745
The mean radius is 6371.0 km.  The radius at any latitude is equal to that times the cosine of the latitude.  The Earth turns once on it's axis in 23 hr 56 min 4.0989 sec, or 23.93447 hrs.\n\nIt takes that long to travel 2(Pi)(6371)(cos(lat)).  Divide that distance by the time above and you're in the ball park (neglecting the difference in polar and equatorial radii).\n\nNote: The figure given for the Earth's rotation is correct according to Astrophysical Data: Planets and Stars.  The 24-hour day is measured from noon to noon - in relation to the Sun.  The Earth kind of rolls around its orbit, so after it has turned thru one rotation it has also moved along its orbit.  It has to turn for another 53.9 sec past the full rotation for the Sun to be back to due south again.
1105887
No. The Earth's axis spins in a 46° diameter circle in a 26,000 year cycle. This motion is called precession. Polaris will be closest to the pole in about 100 years. In 14,000 years, Vega will be within 5° of the pole.
1106342
Halley's Comet returns about every 75-76 years.  The orbital period is not precise but to perturbations from the gravity of the other planets in the solar system.
1020238
Right ascension and declination are just like longitude and latitude, but in the sky instead of on Earth. The stars are fixed on this grid, so if you know the right ascension of any star then you can measure from that star to any other point. If you want to know the right ascension of the meridian at your location, or the hour angle of the vernal equinox, which is 0hr, you need to know the local sidereal time. The US Naval observatory has an online calculator. Of course local sidereal time is changing continuously as the Earth rotates, so at the moment you determine the local sidereal time you need to start a clock and later add whatever that clock says to the value you originally got to have the current local sidereal time. Also, the clock should really be a sidereal clock and not a solar clock, because a solar day is 24 hours but a sidereal day is only 23h 56m 4s, although a regular solar clock is probably good enough for a few hours. The difference is due to the Earth's orbit. Earth rotates once in 23h 56m 4s but in that time it has moved around the Sun enough so that it needs to rotate another 3m 56s to bring the Sun back to the same altitude in the sky. Another way to look at it is that the sun moved 3m 56s in right ascension during the day.
423611
an alignment of more than 2 planets is not a frequent occurrence.  on 21 Dec 2012, mercury, venus and saturn lie roughly along a line, but the rest of the planets are not even close to that line.\n\nthe link below -- to the "bad astronomy" website -- concerns the last time there was something close to a "line-up" of the planets and a thorough analysis of its (lack of) effects.  the second link gives a more thorough look at how often "line-ups" occur.  basically, the time needed for an exact line-up to happen is about every 340 million years for all planets excluding the earth, and every 180 trillion years (or more than 10,000 times more than the current accepted value for the age of the universe) if you include the earth being on the same side of the sun and lying on a line with all other planets.\n\nalso, the "age of aquarius" has nothing to do with planetary alignment, but refers to the motion of the point of the vernal equinox in the sky relative to the zodiac constellations as caused by the precession of the earth's poles.  in roughly 600 years, this point will pass from pisces into aquarius.
438696
the guys talking about our sun in 5 billion years are correct. by then we should figure out a way to move to a new star system.