Sentences with phrase «more circular orbit»

Well, this 100 000 year cycle is the ECCENTRICITY CYCLE of the Earth Orbit around the Sun: The orbit oscillates between a more elliptical and a more circular orbit every (approximately) 100 000 years.

This cycle coincides with a change in Earth's orbit as it evolves from a more circular orbit to a more elliptical orbit.

The planet is in a binary star system, so it might also be the case that the second star in the binary made a close approach that threw HD 20782 off a more circular orbit.

Only objects in more circular orbits have low enough relative velocities to coalesce.

Not exact matches

The Earth's axis wobbles or «precesses» on a 26,000 - year cycle; it changes its average tilt on a 41,000 - year cycle; and it shifts its orbit from being roughly circular to more elliptical on a 100,000 - year cycle.

What's more, multi-planet systems tend to have circular orbits all in the same plane, and singletons» orbits tend to be elliptical and tilted.

While multiple - planet systems tend to have circular orbits that all lie in the same plane — like our solar system — the orbits of singletons tend to be more elliptical and are often misaligned with the spins of their stars.

Since the tidal effect is strongest when the moon is closest to the primary, it also tends to make the orbit more circular.

What's more, the close, roughly circular orbits of Phobos and Deimos are inconsistent with the idea that they were once asteroids that were strong - armed into joining the Martian family by the Red Planet's gravitational clout.

There is evidence that Earth has gone through at least one globally frozen, «snowball» state in the last billion years, which i... ▽ More Although the Earth's orbit is never far from circular, terrestrial planets around other stars might experience substantial changes in eccentricity that could lead to climate changes, including possible «phase transitions» such as the snowball transition (or its opposite).

CFEPS Larger image For an Edgeworth - Kuiper object (EKO), 2004 XR 190 («Buffy») has an unusually circular orbit (more).

Planet c may have a minimum mass around 54 + / - 0.7 percent of the mass of Jupiter with a semi-major axis of 3.6 + / -0.1 AUs and a roughly circular orbit (0.10 +0.5 / -0.1) that takes more than 6.5 years (2,391 +100 / -87 days) to complete (Gregory and Fischer, 2010; and Fischer et al, 2001 — in pdf).

The planet is comparable to Saturn in mass and size, and is on a nearly circular 229 - day orbit around its two p... ▽ More We report the detection of a planet whose orbit surrounds a pair of low - mass stars.

A comparison of stellar densities from asteroseismology with densities derived from transit models in Batalha et al. assuming circular orbits shows significant disagreement for more than half of the sample due to systematics in the modeled impact parameters, or due to planet candidates which may be in eccentric orbits.

The four distinguishing characteristics of the spirals are: (a) they have more orderly, rotational motion than random motion (the rotation refers to the disk as a whole and means that the star orbits are closely confined to a narrow range of angles and are fairly circular); (b) they have some or a lot of gas and dust between the stars; (c) this means they can have new star formation occuring in the disk, particularly in the spiral arms; and (d) they have a spiral structure.

Given what an important breakthrough it was for Kepler to realize, and convince others, that the movements of the planets were not constrained to divinely perfect circles, it's kind of surprising that now we have a case where uniform circular orbits are apparently the more physically valid solution and elliptical orbits are the solution being forced by selectively discarding data.

That means that the belt's biggest bodies... would never have formed unless they originally followed more circular, low - inclination orbits.

Wikipedia (that «highly reliable font of wisdom») says «The Copernican system was no more accurate than Ptolemy's system, because it still used circular orbits.

Those arguing that Earth should be orbiting about the solar system's barycenter seem to be assuming that a (more or less) circular orbit about the barycenter should be possible.

MILANKOVITCH CYCLES overall favor N.H. cooling and an increase in snow cover over N.H high latitudes during the N.H summers due to the fact that perihelion occurs during the N.H. winter (highly favorable for increase summer snow cover), obliquity is 23.44 degrees which is at least neutral for an increase summer N.H. snow cover, while eccentricity of the earth's orbit is currently at 0.0167 which is still circular enough to favor reduced summertime solar insolation in the N.H. and thus promote more snow cover.

Our orbit is also more circular at some times (repeating at about 100,000 and 400,000 years), making the month - of - closest - approach factor periodically less important.