Oort in a sentence

Structure and composition The presumed distance of the Oort cloud compared to the rest of the Solar System The Oort cloud is thought to occupy a vast space from somewhere between convert to as far as convert from the Sun.

The region can be subdivided into a spherical outer Oort cloud of convert, and a torus -shaped inner Oort cloud of convert.

They found that the Oort cloud could not account for all short-period comets, particularly as short-period comets are clustered near the plane of the Solar System, whereas Oort-cloud comets tend to arrive from any point in the sky.

If it survives the intense heat and pressure from the encounter without breaking up, it will then begin to head back out to the Oort Cloud on the edge of the solar system, passing by Earth along the way in early February.

Oort’s research also revealed that 79.87% of application accounts go unused every month, highlighting that users have access to too many applications and sensitive data.

The Kuiper Belt is one of the largest structures in our solar system - others being the Oort Cloud, the heliosphere and the magnetosphere of Jupiter.

Van Oort remarked that Thursday was a beautiful day to launch the canoes.

It is thought to have originated from the Oort cloud, a giant spherical icy shell that surrounds our and dates back some 4.5billion years and may measure as much as 25 miles (40km) across.

According to the models, about half of the objects scattered travel outward toward the Oort cloud, whereas a quarter are shifted inward to Jupiter's orbit, and a quarter are ejected on hyperbolic orbits.

According to these models, the number of collisions early in the Solar System's history was so great that most comets were destroyed before they reached the Oort cloud.

Although no confirmed direct observations of the Oort cloud have been made, it may be the source of all long-period and Halley-type comets entering the inner Solar System, and many of the centaurs and Jupiter -family comets as well.

Based on their orbits, most of the short-period comets may come from the scattered disc, but some may still have originated from the Oort cloud.

Davies p. 39 For an Oort cloud object to become a short-period comet, it would first have to be captured by the giant planets.

Galactic tidal forces stretch the cloud along an axis directed toward the galactic centre and compress it along the other two axes; these small perturbations can shift orbits in the Oort cloud to bring objects close to the Sun.

If correct, this would have significant implications regarding the formation and structure of the Oort cloud.

It has been suggested that the Kepler observatory may also be able to detect objects in the Oort cloud.

Its regular passage through the Solar System's Oort cloud would send large numbers of comets towards Earth, massively increasing the chances of an impact.

Oort noted that the number of returning comets was far less than his model predicted, and this issue, known as "cometary fading", has yet to be resolved.

Some scholars theorise that the galactic tide may have contributed to the formation of the Oort cloud by increasing the perihelia (smallest distances to the Sun) of planetesimals with large aphelia (largest distances to the Sun).

The galactic tide's effects on the Solar System 's Oort cloud are believed to cause 90 percent of long-period comets.