Potentially Hazardous Asteroid (PHA) | Simple Site

DART (Double Asteroid Redirection Test)

Didymos & Dimorphos

Planetary Defense

Planetary Defense Coordination Office

Potentially Hazardous Asteroid (PHA)

NASA’s DART Mission Changed Orbit of Asteroid Didymos Around Sun

New research reveals that when NASA’s DART (Double Asteroid Redirection Test) spacecraft intentionally impacted the asteroid moonlet Dimorphos in September 2022, it didn’t just change the motion of Dimorphos around its larger companion, Didymos; the crash also shifted the orbit of both asteroids around the Sun.

Posted March 6, 2026

Near-Earth Asteroid (NEA)

Deep Space Network

Jet Propulsion Laboratory

Planetary Defense

Planetary Defense Coordination Office

Potentially Hazardous Asteroid (PHA)

Space Communications & Navigation Program

NASA’s Planetary Radar Tracks Two Large Asteroid Close Approaches

The Deep Space Network’s Goldstone planetary radar had a busy few days observing asteroids 2024 MK and 2011 UL21 as they safely passed Earth. Scientists at NASA’s Jet Propulsion Laboratory in Southern California recently tracked two asteroids as they flew by our planet. One turned out to have a little moon orbiting it, while the […]

Posted July 3, 2024

NEA Scout (Near Earth Asteroid Scout)

NEO Surveyor (Near-Earth Object Surveyor Space Telescope)

Planetary Defense

Planetary Defense Coordination Office

Potentially Hazardous Asteroid (PHA)

NASA Asteroid Experts Create Hypothetical Impact Scenario for Exercise

The fifth Planetary Defense Interagency Tabletop Exercise focused on an asteroid impact scenario designed by NASA JPL’s Center for Near Earth Object Studies. A large asteroid impacting Earth is highly unlikely for the foreseeable future.

Posted July 2, 2024

Deep Space Network

Jet Propulsion Laboratory

Near-Earth Asteroid (NEA)

Planetary Defense

Planetary Defense Coordination Office

Potentially Hazardous Asteroid (PHA)

Space Communications & Navigation Program

NASA’s Planetary Radar Images Slowly Spinning Asteroid

During the close approach of 2008 OS7 with Earth on Feb. 2, the agency’s Deep Space Network planetary radar gathered the first detailed images of the stadium-size asteroid. On Feb. 2, a large asteroid safely drifted past Earth at a distance of about 1.8 million miles (2.9 million kilometers, or 7 ½ times the distance […]

Posted February 26, 2024

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7

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2

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3

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11

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1

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5

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1

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1

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2

Kathleen Rubins

2

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5

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14

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9

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19

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3

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51

8

1

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3

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2

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1

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5

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12

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8

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9

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13

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75

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5

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44

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38

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1

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18

5

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7

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3

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2

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2

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2

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29

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3

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1

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1

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1

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103

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2

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4

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1

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1

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4

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1

11

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10

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2

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4

3

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4

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5

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1

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1

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1

20

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4

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18

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1

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3

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47

1

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1

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5

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7

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1

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1

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94

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41

1

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17

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6

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2

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9

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6

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1

5

1

2

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1

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1

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312

23

3

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2

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1

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87

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225

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2

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100

4

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5

1

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49

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38

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2

1

7

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1

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2

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1

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33

2

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2

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4

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13

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1

20

Langley Research Center

137

Center Innovation Fund

3

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3

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9

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29

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1

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3

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15

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17

Grades 5 - 8 for Educators

13

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96

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1

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6

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1

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1

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1

1

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1

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2

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12

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1

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1

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