Planetary Defense

Science And Technology

No confirmed meteor impact or airburst was recorded on Earth yesterday, according to authoritative monitoring agencies. While small objects enter the atmosphere frequently, none...

Science And Technology

NASA’s planetary defense system is a coordinated set of missions, sensors, and analyses designed to detect, track, and characterize near-Earth objects and reduce the risk of h...

science-risk-clarification

Will Earth end in 2029? No, reputable scientific assessments indicate Earth is not at risk of ending in 2029. This question is usually prompted by speculative scenarios involvin...

science

Multiple years of radar and optical observations have firmly ruled out any chance of an Earth impact in 2029. Asteroid 99942 Apophis will make a close flyby on 13 April 2029, pa...

Guides And Explainers

A meteorite hit occurs when space debris survives passage through Earth’s atmosphere and strikes the ground. Most meteorites are small and land in oceans or remote areas, caus...

planetary defense

Near-Earth asteroids are rocky bodies whose orbits can bring them within about 1.3 times the distance from Earth to the Sun, raising interest in detection and tracking. In 2025,...

space-science

Concerns about an asteroid in 2029 typically refer to close approaches by near-Earth asteroids, notably Apophis around April 2029. Current orbit calculations show Apophis will p...

planetary defense

What happens if an asteroid hits Earth depends mainly on size, speed, composition, and where it strikes. Most small asteroids burn up harmlessly, while larger objects can cause...

space

When a meteor crashes on Earth, the outcome depends on size, speed, composition, and entry angle. Most small fragments burn up harmlessly, while larger objects can produce brigh...

Science and Technology

NASA monitors thousands of near-Earth objects to assess impact risk and provide timely warnings when necessary. Using ground- and space-based telescopes, radar, and coordinated...