Skip to main content

Satellite to follow Empire State Building-sized asteroid as it zips by Earth

ESA's Ramses mission to asteroid Apophis
ESA's Ramses mission to asteroid Apophis. ESA

There’s a huge asteroid coming our way in 2029 and the European Space Agency (ESA) wants to track it every step of the way.

Don’t worry, you can look up with confidence, as the 1,230-feet-long (about 375 meters) Apophis asteroid is not on a collision course with Earth. But zipping by at a distance of just 20,000 miles (about 32,000 kilometers), it’ll be coming remarkably close.

As part of ongoing research into planetary defense, ESA has announced that it’s received permission to embark on preparatory work for the Rapid Apophis Mission for Space Safety (Ramses).

The plan is to have the Ramses spacecraft rendezvous with Apophis and accompany it through what ESA says is a “safe but exceptionally close flyby” of Earth five years from now.

Using data gathered by Ramses, researchers will study the asteroid as Earth’s gravity alters its physical characteristics. It’s hoped that the findings will help to improve our ability to defend Earth from any similar object that’s calculated to be on a collision course in the future.

Commenting on the mission, Patrick Michel, director of research at CNRS at Observatoire de la Côte d’Azur in France, said: “There is still so much we have yet to learn about asteroids, but, until now, we have had to travel deep into the solar system to study them and perform experiments ourselves to interact with their surface.

“For the first time ever, nature is bringing one to us and conducting the experiment itself. All we need to do is watch as Apophis is stretched and squeezed by strong tidal forces that may trigger landslides and other disturbances [on the asteroid] and reveal new material from beneath the surface.”

ESA needs to work efficiently on preparations for the mission, as Ramses has to launch in April 2028 to be able to rendezvous with Apophis in February 2029, two months before the close approach.

In a 2022 test to see if it could alter the course of an asteroid, NASA singled out one in deep space and deliberately crashed a spacecraft into it. Subsequent research found that the impact did indeed change the rock’s trajectory, offering hope of an effective solution for protecting Earth from asteroids spotted coming our way.

Trevor Mogg
Contributing Editor
Not so many moons ago, Trevor moved from one tea-loving island nation that drives on the left (Britain) to another (Japan)…
Juice spacecraft gears up for first ever Earth-moon gravity boost
Artist's impression of ESA's Jupiter Icy Moons Explorer (JUICE) approaching Earth.

The European Space Agency (ESA)'s Juice mission is heading to Jupiter, but it isn't traveling all that way in a straight line. Instead, like most solar system missions, the spacecraft makes use of the gravity of other planets to give it a push on its way.

But Juice will be making an unusual maneuver next year, carrying out the first gravity assist flyby around both Earth and the moon. This week, the spacecraft made its longest maneuver yet to get into position ahead of the first of its kind flyby in 2024.

Read more
Hubble spots an Earth-sized exoplanet just 22 light-years away
An artist’s concept of the nearby exoplanet, LTT 1445Ac, which is the size of Earth. The planet orbits a red dwarf star.

Although astronomers have now discovered more than 5,000 exoplanets, or planets outside of the solar system, the large majority of these planets are considerably larger than Earth. That's partly because it's easier to spot larger planets from tremendous distances across space. So it's exciting when an Earth-sized planet is discovered -- and the Hubble Space Telescope has recently confirmed that a nearby planet, which is diminutive by exoplanet standards, is 1.07 times the size of Earth.

The planet LTT 1445Ac was first discovered by NASA's Transiting Exoplanet Survey Satellite (TESS) in 2022, but it was hard to determine its exact size due to the plane of its orbit around its star as seen from Earth. “There was a chance that this system has an unlucky geometry and if that’s the case, we wouldn’t measure the right size. But with Hubble’s capabilities we nailed its diameter,” said lead researcher Emily Pass of the Harvard-Smithsonian Center for Astrophysics in a statement.

Read more
Mars flyover video shows a stunning network of valleys
mars flyover video shows a stunning network of valleys esa

Fly across Mars’s ‘labyrinth of night’ with Mars Express

The European Space Agency (ESA) has released a gorgeous video visualizing part of Mars’ Noctis Labyrinthus, a vast system of deep valleys that stretches for around 740 miles (1,190 kilometers), or for context, roughly equal to the length of Italy.

Read more