Scientists propose that interplanetary dust accumulation could have triggered gradual extinctions, such as the demise of dinosaurs, and influenced Earth's climate over long periods. The research challenges current understanding of the Milankovich Effect, which is believed to drive climate change on a 100,000-year scale.
The Near Earth Asteroid Rendezvous (NEAR) spacecraft successfully completed its Earth swingby, putting it on course for a historic encounter with asteroid 433 Eros. Scientists released the first images from the mission on January 26, providing valuable insights into the spacecraft's performance and trajectory.
The images taken by the Near Earth Asteroid Rendezvous (NEAR) spacecraft reveal a cratered surface and porous composition of asteroid 253 Mathilde. Scientists were surprised to find large craters packed tightly on the relatively small surface, indicating that large objects can strike without destroying it.
The Arecibo Observatory has completed a $25 million upgrade, increasing its sensitivity by a factor of about 20 for radar studies of the solar system. The new system will allow scientists to listen into cellular phone calls on Venus and detect steel golf balls at moon distances.