A recent study suggests that the Oort cloud might be more active than previously thought. The Oort cloud is a vast reservoir of comets that extends halfway to the nearest star. It’s thought to have originated when icy objects were ejected outward from among the Jovian planets. 

The study looked at a meteor seen in Finland in 2022, which appeared to have a hyperbolic path. The team found that the meteor was statistically more likely to be a perturbed Oort cloud object rather than a true interstellar object. 

The study also argues that the Oort cloud is much more active than we thought because we’ve never found an interstellar meteorite. 

The Oort cloud is incredibly diffuse, with the distance between neighboring objects theorized at tens of millions of kilometers

But we’ve never found an interstellar meteorite. A new study argues that this is because the Oort cloud is much more active than we thought. The Oort cloud is a halo of icy material on the outermost edge of the solar system, where the Sun’s gravity is barely strong enough to hold them in a stellar orbit.

The Oort cloud is considered the outer edge of the solar system because it’s the only edge where the gravity of another star binds objects to its solar system, or where the gravity of the Milky Way itself takes over. The outer Oort cloud is only loosely bound to the Solar System and its constituents are easily affected by the gravitational pulls of both passing stars and the Milky Way itself. 

The Oort cloud is a huge sphere of icy rocks beyond the Kuiper Belt. It’s thought to surround the entire Solar Solar System. The Oort Cloud is about 2 light years away from Earth. This means it takes light – traveling at 300,000 kilometers every second – 2 years to reach Earth from the Oort cloud

Some say it’s unlikely that the Oort cloud has any large worlds. However, others suggest that there may be a 7% chance that Earth has another neighboring planet hiding in the Oort cloud. 

Some notable objects in the Oort cloud include: 

• Sedna A dwarf planet that may be the innermost object in the Oort cloud. It was discovered in 2003 and has a wildly elliptical orbit that takes it far beyond the Kuiper Belt. 
• Tyche A hypothetical gas giant located in the Solar System’s Oort cloud. It was first proposed in 1999 by astrophysicists John Matese, Patrick Whitman, and Daniel Whitmire of the University of Louisiana at Lafayette. 

Other research suggests that the Oort cloud may be hiding a rogue exoplanet. In 1906, astronomer and businessman Percival Lowell launched a search for “Planet X,” a hypothetical giant planet orbiting the sun beyond Neptune

The Oort Cloud is much further away from Earth than the Kuiper Belt: 

• Oort Cloud About 2 light years away from Earth, or 36 times farther away than the farthest objects of the Kuiper Belt. 
• Kuiper Belt Approximately 2,695,718,403 miles from Earth, or between 30 and 55 AU from the sun. 

The Oort Cloud is the most distant region of our solar system. Even the nearest objects in the Oort Cloud are thought to be many times farther from the Sun than the outer reaches of the Kuiper Belt.

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