every 5-10 years.
Rocky asteroids. Icy comets often live in and come from the Kuiper Belt.
comets
Most likely from Comets from the Ort cloud (actually comets may have been prevalent throughout the Solar System early on then relegated to the Ort cloud by the solar wind) smashing into earth during its development. But you can't discount Volcanic action either. TommyTrouble
The Oort Cloud
They come from the outer reaches of space.
Rocky asteroids. Icy comets often live in and come from the Kuiper Belt.
Comets come from the Oort cloud and the Kupier Belt
Comets.
comets
Most likely from Comets from the Ort cloud (actually comets may have been prevalent throughout the Solar System early on then relegated to the Ort cloud by the solar wind) smashing into earth during its development. But you can't discount Volcanic action either. TommyTrouble
The Oort Cloud
Long period comets originate in the Oort Cloud.
yes
No. The Oort cloud is way beyond the orbit of Saturn. It's where many of the comets come from.
Comets come toward earth during their orbits. They are drawn toward the sun by gravity and sometimes cross earth's orbital path in the process.
Yes
They come from the outer reaches of space.