Sentences with word «precession»
Precession refers to the slow rotation or movement of an object's axis or orbit over a long period of time. It can be compared to the wobbling motion of a spinning top as it slows down. Precession commonly occurs in astronomical bodies like planets and moons, often altering their orientation or position gradually. Full definition
... to the natural frequency of precession of the elementary magnets.
britannica.com
In a linear version of the Milankovitch theory, the two shorter cycles can be explained as responses to insolation cycles driven by precession and obliquity.
where c9, c10, c11, c12, c13 and c14 are cutoff frequencies (in per kyr) for precession cycles, which are (23.6 per kyr), (22.3 per kyr), and (19.1 per kyr) over the past 1.4 myr.
Their paths shift slightly from one orbit to the next — a phenomenon known as precession — but when astronomers use general relativity to predict the amount of this shift, their answers are off by a factor of four.
And, orbital tuning won't create exactly the * combination * of frequencies (as is clearest with precession cycles) that match the astronomical cycles.
I remember hearing about something about axial precession in an astronomy lecture, where in about 10,000 years, the rotational tilt of the Earth's axis is going to change so much that the «North Star», Polaris, won't be the North Star any longer.
This so - called precession of Mercury's perihelion wasn't much; it worked out to a break per orbit of a mere millionth of a percent from Newtonian predictions.
Marine and terrestrial sediment sequences demonstrate that subtropical African climate periodically oscillated between markedly wetter and drier conditions, paced by earth orbital precession cycles recurring roughly every 20 kyr (Lourens et al., 1996).
Page 2 of 23 Duncan Steel: Perihelion precession, polar ice and global warming Introduction Record melting of Arctic sea ice over the past year (Schiermeier 2012) has been widely presumed to be a consequence of anthropogenic global warming (AGW), and yet a natural mechanism exists that may be responsible, at least in part.
One is geodetic precession, in which the curvature of space - time around a massive object, such as Earth, induces a slight wobble in an orbiting gyroscope.
This is because the smaller the inner flow becomes, the closer to the black hole it would approach and so the faster its Lense - Thirring precession cycle would be.
«That's clearly not precession,» says astrophysicist David Merritt of Rutgers University in Piscataway, New Jersey.
The success of general relativity in explaining most of Mercury's remaining precession helped persuade scientists that Einstein's theory was right.
4 - World wide melting of ice happens when precession insolation is on a decreasing trend..
13:00 - 13:15 Precession forcing of fire activity in subtropical southern Africa over the past 170,000 years Anne - Laure Daniau, Maria Fernanda Sánchez Goñi, Philippe Martinez, Dunia H. Urrego, Viviane Bout - Roumazeilles, Stéphanie Desprat, Jennifer Marlon
But orbital precession occurs only when two black holes have axes of rotation that point in random directions, and it disappears when the axes are both perpendicular to the orbital plane.
As I noted above, DS proposal is that precession causes a warmer spring and day with the rest of warming following.
Graph A is completely different and shows tidal effects on earth that are not subject to planetary precessions and is far more accurate in my opinion of maintaining a more precise longer lasting 60 year period.
After overcoming a few technical hurdles related to this circular motion, they tracked electrons» spin precession over the course of 0.7 seconds — about 1000 times longer than was previously possible with beams, which should open the way to greater sensitivity.
Eventually, he adds, the group plans to start using thorium fluoride, which is harder to measure than hafnium fluoride, but whose greater stability offers even longer precession times.
We propose that this effectively precludes a «double precession - cycle» interglacial [e.g., Raymo, 1997] in the Holocene without human influence.»
The moon's 29 - day orbit around the Earth helps to bring the ISS into alignment with it every 10 days, but Mars» relative motion is so small that we must wait for orbit precession alone, which gets us aligned roughly every 30 days or so.
Precession alone is powerful enough to drive a 20,000 year cycle wherein the Sahara alternates between a lush, wet land with three giant interconnected lakes and the desert we see today.
«T» denotes changes in the tilt (or obliquity) of the Earth's axis, «E» denotes changes in the eccentricity of the orbit (due to variations in the minor axis of the ellipse), and «P» denotes precession, that is, changes in the direction of the axis tilt at a given point of the orbit.
Precession refers to changes in the time of the year when the Earth is closest to the Sun, with quasi-periodicities of about 19,000 and 23,000 years.