NASA’s solar probe achieves closest approach to the sun of any artificial object

NASA is preparing to “taste” the sun on Christmas Eve.

The bureau’s Parker Solar Probe is just days away from making its closest approach ever to the Sun on Tuesday, when it will fly closer to our star than any other man-made object in history.

The spacecraft, about the size of a small car, is scheduled to dive to within 3.86 million miles of the sun’s surface at 6:40 a.m. ET on Tuesday. It passes by at approximately 430,000 miles per hour. According to NASA.

“If you think about it, it’s like going 96 percent of the way to the surface of the sun,” said Kelly Kolek, a program scientist in NASA’s heliophysics division.

Because mission controllers cannot communicate with the spacecraft during maneuvers, NASA will have to wait about three days before receiving a signal that the spacecraft has survived its rendezvous with the sun.

The first images of the close encounter will then likely be transmitted to Earth sometime in January, the agency said.

As the Parker Solar Probe swoops toward the Sun, it will likely fly through a plume of solar plasma and potentially fly into the star’s active regions, Kolek said.

The mission was designed to study the outermost part of the Sun’s atmosphere, an extremely hot region known as the corona. Scientists are keen to look at the corona up close because researchers have long puzzled over why the outer layer of the sun’s atmosphere is hundreds of times hotter than the star’s surface.

Observations of the corona will also help researchers study how storms that form on the sun’s surface erupt into space. For example, the spacecraft will be able to observe streams of the most energetic solar particles coming from the Sun and exploding into space at supersonic speeds.

“This is the birthplace of space weather,” Kolek said. “While we have observed space weather from afar, Parker is now living space weather. In the future, we will be able to better understand how space weather forms.” , when we look at solar storms through a telescope, we can understand what they mean for us here on Earth.”

During periods of intense space weather, the Sun can emit huge solar flares and streams of charged particles known as solar wind directly to Earth. When these explosions interact with Earth’s magnetic field, they could not only supercharge the aurora, but also damage satellites and take out power grids.

Kolek said the Parker Solar Probe mission will help researchers better predict space weather and its potential impacts, similar to the work meteorologists and atmospheric scientists do about weather on Earth. said it was helpful.

The Parker spacecraft launched into space in 2018 and has orbited the sun more than 20 times since then. The Christmas Eve flyby will be the first of three final flybys planned for the mission. The spacecraft is named after Eugene Parker, the pioneering astrophysicist at the University of Chicago who first theorized the existence of the solar wind. Mr. Parker passed away in 2022 at the age of 94.

Last month, the spacecraft flew near Venus in a maneuver intended to slingshot its way to the sun. The upcoming approach was timed to coincide with the sun’s most active period in its 11-year cycle. This busy phase is typically characterized by a flurry of solar storms and high magnetic activity and is known as solar maximum.

Scientists like Kolek are hoping the Parker Solar Probe will have a front-row seat if a storm hits the sun’s surface on Christmas Eve.