SpaceRef - Astronomy - Asteroids And Comets - Near Earth Objects (NEO) and Earth Crossing Asteroids

Arecibo Planetary Radar - This page describes the radar imaging of asteroids done at the Arecibo observatory including information on the recent upgrade of their radar system.

Catalina Sky Survey - The Catalina Sky Survey (CSS) is a program to discover comets and asteroids and to aid in the identification of potentially hazardous near- earth objects (NEOs). This is one of several surveys working to quantify the danger of future Earth impacts.

E.A.R.N.- European Asteroid Research Node - E.A.R.N. is an informal association of European research groups active in asteroid research. The idea behind this service is to provide a means for easy and fast communication, exchange of data and other information in both observational and theoretical research on asteroids.

Earth-Crossing Asteroid Web Pages - This site at Washington State University is dedicated to the class of asteroids whose orbits cross that of Earth. Included are pages on optical and radar tracking of asteroids and impact hazards presented by some of these objects.

Lincoln Near Earth Asteroid Research (LINEAR) project - The Lincoln Near Earth Asteroid Research (LINEAR) project is a MIT Lincoln Laboratory program funded by the United States Air Force. The goal of the LINEAR project is to demonstrate the application of technology originally developed for the surveillance of earth orbiting satellites, to the problem of detecting and cataloging Near Earth Asteroids that threaten the Earth.

List Of The Potentially Hazardous Asteroids (PHAs) - This page at the Harvard Smithsonian Observatory contains a list of asteroids that could pose a threat to Earth at some point in the future. The list is constantly updated and contains the exact location of each of these asteroids.

Near Earth Object Fact Sheet - The page at NASA GSFC's National Space Science Data Center (NSSDC) provides detailed information on Near Earth Objects.

Near Earth Object Program - Near-Earth Objects (NEOs) are comets and asteroids that have been nudged by the gravitational attraction of nearby planets into orbits that allow them to enter the Earth's neighborhood. This website serves as the main focal point for NASA's various Near Earth Object research activities. It contains descriptions of NASA ground-based research, space missions, and links to a large number of activities around the world.

NEODyS - Near Earth Objects Dynamic Site - NEODyS provides information and services for all Near Earth Asteroids. Each NEA has its own dynamically generated home page providing information and services, and a search facility puts the information in easy reach.

OCA-DLR Asteroid Survey (O.D.A.S.) - O.D.A.S. is a dedicated programme to search for asteroids and comets, with special emphasis on NEO's within the framework of the EUNEASO project, in cooperation and support of global efforts in NEO-research.

Planetary Society Near Earth Objects Page - This page contains a collection of links to various Near Earth Object detection activities around the world and describes the Planetary Society's participation in some of these activities.

The EUNEASO Project - EUNEASO Project is the European NEO Search, Follow-up and Physical Observation Programme EUNEASO is a cooperation between European institutes working in the field of asteroid research to organize a large-scale NEO (Near Earth Object) search programme. EUNEASO uses existing infrastructures and telescopes and install state-of-the-art CCD camera systems. In parallel to the search programme we build up the capability to perform continuous astrometric follow-up and physical observations of newly discovered and/or favourably approaching NEOs.

The International Astronomical Union NEO Page - A number of minor bodies in the Solar system (asteroids and comets) exist whose orbits intersect or pass close to that of the Earth (Near Earth Objects or NEOs). The possibility therefore exists that some of these bodies may impact on Earth sometime in the future, as has happened a number of times in the past as shown by the geological record. The existence of such a risk is attracting increasing attention from the public and the media.

The Lowell Observatory Near-Earth Object Search (LONEOS) - LONEOS is a system designed to find Earth-crossing asteroids (ECAs) and comets (ECCs), collectively known as near-Earth objects (NEOs).

The NEO Confirmation Page - This web page at the Harvard Smithsonian Astrophysical Observatory is designed for astronomers to report confirmatory sightings of recently discovered Near Earth Objects.

The NEO Page - This web page at the Harvard Smithsonian Astrophysical Observatory contains a wealth of information on the characteristics of Near Earth Objects and the reporting mechansims used by astronomers to report new dsicoveries or confirm previously made discoveries.

Visualization of Earth-Approaching Asteroids Castalia, Toutatis, and Geographos - This page at NASA JPL displays clips from a video describing radar investigations of the near-Earth asteroids Castalia, Toutatis, and Geographos. The video has been broken down into clips of about a minute or less so that each clip can be easily downloaded.