The United Launch Alliance Delta IV Heavy rocket was used to launch the NASA'sParker Solar Probe. The mission of the solar probe is to study the sun in unprecedented detail.

According to a statement from NASA, the solar probe became the first to touch the sun when it swooped inside the sun's outer atmosphere on April 28, 2021. The probe will fly seven times closer to our star than any other craft, and will complete 24 laps of the sun over its seven-year lifespan.

The European Space Agency says that the solar probe is named after Eugene Parker, who first proposed the existence of solar wind. In becoming the first person to ever witness the liftoff of their namesake spacecraft, Parker visited the probe during its construction and witnessed its launch. Eugene N.Parker died on March 15, 2022, at the age of 94.

How hot is the sun?

TheParker Solar Probe is going to answer questions about solar physics that we have been puzzling over for more than six decades.

It is a spaceship loaded with technological breakthroughs that will solve many of the largest mysteries about our star, including finding out why the sun's corona is so much hotter than its surface. We are very proud to be carrying Gene's name with us on this amazing voyage of discovery.

Parker Solar Probe speed

The probe flew by the sun at a top speed of . That probe traveled faster than any probe had traveled before.

According to NASA, the closest approach to the sun by the solar probe will see it reach speeds of approximately 430,000 mph.

Parker Solar Probe trajectory

The Parker Solar Probe will make 7 Venus gravity assist flybys and 24 orbits of the sun throughout its lifetime.

The Parker Solar Probe will make 7 Venus gravity assist flybys and 24 orbits of the sun throughout its lifetime.  (Image credit: Johns Hopkins University Applied Physics Laboratory.)

Over the course of its seven-year lifespan, theParker Solar Probe will shrink its circle around our star because it has flown closer to the sun than any other craft.

The solar probe would not be possible without the help of Venus gravity assist flybys. The probe will fly by the sun seven times over its lifetime, coming as close as 3.83 million miles (6.16 million km), seven times closer than Mercury.

Parker Solar Probe temperature

When the probe makes its closest approach to the sun, its solar shields will experience temperatures approaching 2,600 degrees Fahrenheit (1,400 degrees Celsius), according to APL.

The science instruments will be protected from the heat and remain close to the room temperature of about 85 degrees F (30 degrees C).

Parker Solar Probe objectives

The solar probe is studying the sun up close and personal in order to understand how energy and heat move through the sun's atmosphere and affect processes such as the solar wind.

The three main scientific objectives of theParker Solar Probe are:

  1. Trace the flow of energy that heats and accelerates the solar corona and solar wind. 
  2. Determine the structure and dynamics of the plasma and magnetic fields at the sources of the solar wind. 
  3. Explore mechanisms that accelerate and transport energetic particles.   

The sun is the primary source of Earth's light and heat, but that isn't the only way it affects the planet. The solar wind is a collection of charged particles that stream from the star and travel past Earth at speeds of more than a million mph. Space weather is caused by changes in the solar wind and the magnetic field on our planet.

Space weather is affected by the solar wind and other solar eruptions. During times of peak activity, space weather can pose a risk to communications on Earth, satellites and even spacewalking astronauts.

NASA's Solar Dynamics Observatory captured the solar flare May 3, 2022, which is visible at lower left.

NASA's Solar Dynamics Observatory captured a solar flare on May 3, 2022, which is visible on the lower left. (Image credit: NASA/SDO)  (Image credit: NASA/SDO)

The solar probe is helping scientists understand more about the sun's underlying mechanisms so they can improve space forecasting efforts and be prepared for changes in solar activity.

According to the APL, until we can explain what is going on up close to the sun, we will not be able to accurately predict space weather effects that can cause havoc at Earth.

Parker solar probe instruments

There are four instruments in the spacecraft.

The most abundant particles in the solar wind are measured by the Solar Wind Electrons Alphas and Protons Investigation.

The Wide-field Imager for Solar Probe Plus is a telescope that makes three-dimensional images of the sun's corona and inner heliosphere, and provides 3D images of shocks and other structures. The bright rim was detected by the WISPR instrument when flying past Venus in 2020. NASA officials said in a description of the image that scientists suggest it may be a phenomenon known as nightglow caused by light emitted by oxygen atoms high in the atmosphere that recombine into molecule in the nightside.

During a Venus flyby July, 2020, the Parker Solar Probe's WISPR instrument observed a bright glow around the edge of the planet.

During a Venus flyby July, 2020, the Parker Solar Probe's WISPR instrument observed a bright glow around the edge of the planet.  (Image credit: NASA/Johns Hopkins APL/Naval Research Laboratory/Guillermo Stenborg and Brendan Gallagher)

The FIELDS makes direct measurements of the shock waves that travel through the sun's atmosphere.

The Integrated Science Investigation of the Sun consists of two instruments that will take an inventory of the elements in the solar atmosphere.

Eugene Newman Parker legacy

The Parker Solar Probe is named after pioneering astrophysicist Eugene Parker who first proposed the phenomenon of solar wind in 1958.

The Parker Solar Probe is named after pioneering astrophysicist Eugene Parker, who first proposed the existence of the solar wind in 1958.  (Image credit: University of Chicago )

In the 1950s, an astronomer at the University of Chicago proposed several ideas about how stars give off energy. The solar wind is a cascade of energy that comes from the sun and is made up of a complex system of particles.

The mission was called Solar Probe Plus. The mission was renamed to honor the scientist a few days before his 90th birthday.

This is the first time that NASA has named a vehicle after a living individual. I am very excited to be involved in honoring a great man.

NASA missions are usually renamed after their certification. The decision was made to honor him before the launch to draw attention to his contributions to heliophysics and space science.

Fox told reporters before the launch that the mission had been a long time in coming because it had taken 60 years for technology to catch up with our dreams.

The solar probe is going to a region of space that has never been explored before. One would like to know more about what is happening in the solar wind. I am sure that there will be some surprises. There always are.

The first person to ever witness the launch of their namesake spacecraft was Parker. In addition, he received numerous awards for his research and significant contributions to science, including the George Ellery Hale Prize, the National Medal of Science, the Bruce Medal, the Gold Medal of the Royal Astronomical Society, the Kyoto Prize, the James Clerk Maxwell Prize and the Crafoord Prize

Eugene Parker witnessed the launch of his namesake spacecraft on August 12, 2018.

Eugene Parker witnessed the launch of his namesake spacecraft on Aug. 12, 2018.  (Image credit: NASA/Glenn Benson)

The University of Chicago released a statement saying that Eugene N.Parker died on March 15, 2022, at the age of 94.

Michael Turner, the Bruce V. and Diana M. Rauner distinguished service Professor of Astronomy and Astrophysics at the University of Chicago, said that the university and the department has lost one of its giants.

Additional resources

The NASA press kit contains information about the solar probe. APL has a series of short videos about the solar probe. Kelly Korreck is a solar scientist at NASA. Check out the Solar Orbiter and learn more about the mission.

Bibliography

M. Johnson-Groh was born on December 13th. NASA entered the solar atmosphere for the first time. NASA. May 5, 2022.

The team worked with the solar probe. The European Space Agency. October 7, 2019. May 5, 2022.

G. Brown was published on May 31st. The solar probe mission was renamed to honor a physicist. NASA. May 5, 2022.

NASA. The year of 2021. In-depth about the solar probe. NASA. May 5, 2022.

The mission of NASA's solar probe. May 5, 2022.

Buckley, M. was published on February 24. The view of Venus is amazing. NASA. May 5, 2022.

R. Garner was published on February 8. Eugene Newman. NASA. A NASA biography article was published on May 5, 2022.