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  1. The Kuiper Belt should not be confused with the Oort Cloud, which is a thousand times more distant. In 1950, astronomer Jan Oort proposed that certain comets come from a vast, extremely distant …

  2. In Depth | Kuiper Belt – NASA Solar System Exploration

    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. Its overall shape is like a puffed-up disk or donut.

  3. In Depth | Our Solar System – NASA Solar System Exploration

    Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova.

  4. Asteroids, Comets & Meteors - NASA Solar System Exploration

    Asteroids and comets – and the meteors that sometimes come from them – are leftovers from the formation of our solar system 4.6 billion years ago.

  5. 9693 Search Results for "Oort cloud" - NASA Solar System Exploration

    Relationship of the Kuiper Belt to the Oort Cloud - NASA Science https://science.nasa.gov/asset/hubble/relationship-of-the-kuiper-belt-to-the-oort-cloud the shell-like …

  6. In Depth | Asteroids – NASA Solar System Exploration

    Main Asteroid Belt: The majority of known asteroids orbit within the asteroid belt between Mars and Jupiter, generally with not very elongated orbits. The belt is estimated to contain between 1.1 and 1.9 …

  7. In Depth | 1P/Halley – NASA Solar System Exploration

    NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

  8. Directory - NASA Solar System Exploration

    Oct 21, 2025 · Solar System Our Solar System Sun Kuiper Belt Oort Cloud Beyond Our Solar System Eclipses

  9. In Depth | Sun – NASA Solar System Exploration

    The Sun formed about 4.6 billion years ago in a giant, spinning cloud of gas and dust called the solar nebula. As the nebula collapsed under its own gravity, it spun faster and flattened into a disk.

  10. Psyche Raw Image: Imager A - NASA Solar System Exploration

    Earth's Moon ... Stay Connected Solar System Our Solar System Sun Kuiper Belt Oort Cloud Beyond Our Solar System Eclipses Planets About Planets PLANETS