What's Happening?
On April 13, 2029, the asteroid Apophis, measuring approximately 375 meters across, will pass by Earth closer than many telecommunications satellites. This event will be visible to around two billion people across Europe, Africa, and parts of Asia under
clear skies. Initially discovered in 2004, Apophis was once thought to pose a potential impact threat in 2029, 2036, and 2068. However, precise radar measurements in 2021 have confirmed that the asteroid will not collide with Earth for at least the next century. The close flyby will allow scientists to study the asteroid's structure and behavior, as Earth's gravity is expected to alter its orbit and spin.
Why It's Important?
The 2029 flyby of Apophis represents a significant opportunity for both public engagement and scientific research. For the general public, it offers a rare chance to observe an asteroid with the naked eye, an event that occurs only once every several thousand years. For scientists, the encounter provides a natural experiment to study the effects of Earth's gravity on a large asteroid, which could inform future planetary defense strategies. The event has also been designated as a United Nations year of asteroid awareness and planetary defense, highlighting its global significance.
What's Next?
Leading up to the 2029 flyby, two missions are planned to study Apophis. NASA's OSIRIS-APEX spacecraft, redirected from its mission to asteroid Bennu, will arrive shortly after the flyby to examine the asteroid's surface changes. The European Space Agency is developing the Ramses mission to observe Apophis before and during the encounter. These missions aim to provide detailed insights into the asteroid's composition and the effects of gravitational forces, contributing to our understanding of similar celestial bodies.
