Near-Earth objects (NEO) are any small solar system body whose orbit brings it to close to Earth. Most known PHOs and NEOs are asteroids, but a small fraction is comets. The United States, the European Union, and other nations are searching for NEOs through a program which is referred to as Spaceguard. NEOs have low surface gravity, and many have Earth-like orbits making them easy targets for spacecraft. This quiz is to test your knowledge on these Near Earth Objects.
If its closest approach to the sun is less than 1.3 astronomical unitsĀ
If its closest approach to the sun is less than 1.7 astronomical unitsĀ
If its closest approach to the sun is less than 1.5 astronomical unitsĀ
If its closest approach to the sun is less than 1.4 astronomical unitsĀ
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7.3%
42.2%
0.75%
7.39%
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42.2%
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19.92%
0.63%
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If its orbit crosses the Earths and it's larger than 140 metersĀ
If its orbit crosses the Earths and it's larger than 120 metersĀ
If its orbit crosses the Earths and it's larger than 100 metersĀ
If its orbit crosses the Earths and it's larger than 130 metersĀ
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19,000
19,229
18,589
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1,955
1,893
2,597
1,981
59
37
66
72
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0.89%
5.5%
49.7%
27.9%
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7.3%
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