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  1. NASA's Near-Earth Object (NEO) web-site. Data related to Earth impact risk, close-approaches, and much more.

    • Tutorial

      Tutorial - NEO Earth Close Approaches - NASA

    • Introduction

      Introduction - NEO Earth Close Approaches - NASA

    • Comets

      *The miss distance is uncertain because this comet’s orbit...

    • Uncertainties

      This page describes the limits placed on the Near Earth...

    • Glossary

      au (Astronomical Unit) Definition. The astronomical unit...

    • SB Close Approach

      SBDB Close-Approach Data API. Version: 1.5 (2023 March)...

    • Related Links

      Related Links - NEO Earth Close Approaches - NASA

    • Site Map

      Site Map - NEO Earth Close Approaches - NASA

  2. NASA's Near-Earth Object (NEO) web-site. Data related to Earth impact risk, close-approaches, and much more.

  3. Welcome to NASA Earth Observations, where you can browse and download imagery of satellite data from NASAs Earth Observing System. Over 50 different global datasets are represented with daily, weekly, and monthly snapshots, and images are available in a variety of formats.

  4. NASA's Near-Earth Object (NEO) web-site. Data related to Earth impact risk, close-approaches, and much more.

  5. Here you can stay informed about the PDCO, NASA's Near-Earth Object (NEO) Observations Program, and upcoming planetary defense flight missions, including NASA'S NEO Surveyor mission.

  6. The NEOCC is ESA's centre for computing asteroid and comet orbits and their probabilities of Earth impact.

  7. The Near-Earth Object (NEO) Observations Program is a key element of NASAs Planetary Defense Program, funding efforts to search for undiscovered NEOs using observatories around the world, calculate and refine NEO orbits, determine NEO physical properties and composition, and study NEO deflection and mitigation technologies.

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