The study, in which the Universidad Carlos III de Madrid (UC3M) and the Universidad Estatal Paulista Júlio de Mesquita Filho (Júlio de Mesquita Filho Paulista State University) (UNESP) of Brazil are participating, analyzes the surface and dynamics of Apophis, an asteroid that will pass close to Earth in 2029.

The Apophis asteroid was discovered in 2004 and has been monitored since then due to its classification as a potentially hazardous asteroid (PHA), as it was estimated that it would have a 2% chance of hitting Earth. This possibility has already been ruled out and, according to the latest measurements, Apophis will reach its closest trajectory to Earth (38,000 kilometers) on the 13th of April, 2029.

This study analyzes the physical characteristics of this celestial body and the possible effects that its approach to Earth may have. Gabriel Borderes-Motta, a researcher at UC3M's Department of Bioengineering and Aerospace Engineering, explains that "collision is not the only possibility in approach events like this one. The gravitational interaction between a planet and a body such as Apophis can change the shape of the body, break the body into pieces, disintegrate possible loose stones on the asteroid's surface, or even remove other bodies orbiting the asteroid (such as rocks, satellites, or rings).

Use this form if you have come across a typo, inaccuracy or would like to send an edit request for the content on this page. For general inquiries, please use our contact form. For general feedback, use the public comments section below (please adhere to guidelines).

Please select the most appropriate category to facilitate processing of your request

NASA is preparing to send humans to Mars sometime in the 2030s. The 3-year mission will expose astronauts to a long period of microgravity, which will cause them to lose bone mass. But now, scientists report transgenic lettuce that produces a bone-stimulating hormone. Someday, astronauts could grow the lettuce in space and help guard against bone loss—simply by eating a big bowl of salad. In addition, the lettuce might help stave off osteoporosis in resource-limited areas here on Earth, the researchers say.

The researchers will present their results today at the spring meeting of the American Chemical Society (ACS).

Previous studies of astronauts on extended space missions have shown that they lose, on average, more than 1% of bone mass per month spent in space, a condition known as osteopenia.