Shop Windows to the Universe

Become a nitrogen atom in the nitrogen cycle in our Traveling Nitrogen Classroom Activity Kit/Game. See all our games, activity kits and classroom activities.
This image shows an artist's rendition of the HESSI spacecraft with the Earth in the background. The lower left image shows a picture of the Sun taken by the Yohkoh satellite. The lower right image or inset shows an enlargement of a solar flare taken in the x-ray segment of light.
Click on image for full size
Courtesy of NASA

HESSI is Go for Launch!
News story originally written on January 9, 2002

HESSI finally has a launch date of January 24, 2002. HESSI has had a hard time getting off the ground! First the probe was damaged in ground vibration testing and had to be repaired. Then there were problems with HESSI's launch vehicle. Despite setbacks, scientists are looking forward to the insight HESSI will bring to the study of space weather.

HESSI stands for High Energy Solar Spectroscopic Imager. HESSI stands to provide data that would help scientists make great strides in understanding solar flares. HESSI will study where flares occur on the Sun, how flares accelerate particles and what happens to a flare over the course of the flare's lifetime. HESSI will be the first mission to view these solar events in the x-ray and gamma ray segments of the electromagnetic spectrum. HESSI will work in coordination with the SOHO, TRACE, GOES, and ACE satellites to provide scientists with observations about the Sun, solar activity and the Sun's effect on Earth.

HESSI is NASA's newest solar science mission. The total cost of the HESSI mission is $85 million. This includes the spacecraft, launch vehicles, mission operations and data analysis.

Last modified January 9, 2002 by Jennifer Bergman.

Shop Windows to the Universe Science Store!

Learn about Earth and space science, and have fun while doing it! The games section of our online store includes a climate change card game and the Traveling Nitrogen game!

Windows to the Universe Community

News

Opportunities

You might also be interested in:

Cool It! Game

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

HESSI Awaits Launch (Updated!)

The launch of solar satellite HESSI has been postponed indefinitely! When the Pegasus rocket designed to boost the X-34A hypersonic vehicle went out of control on June 2nd and had to be blown up, NASA...more

TRACING the Sun...

The TRACE spacecraft was launched April 1st at 9:42 p.m. EST from the central California coast. TRACE stands for Transition Region and Coronal Explorer. TRACE will operate in polar orbit about 400 miles...more

1999--A Year in Review...

It was another exciting and frustrating year for the space science program. It seemed that every step forward led to one backwards. Either way, NASA led the way to a great century of discovery. Unfortunately,...more

STS-95 Launch: "Let the wings of Discovery lift us on to the future."

The Space Shuttle Discovery lifted off from Kennedy Space Center at 2:19 p.m. EST, October 29th. The sky was clear and the weather was great as Discovery took 8 1/2 minutes to reach orbit for the Unitied...more

Moon Found Orbiting Asteroid

A moon was discovered orbiting the asteroid, Eugenia. This is only the second time in history that a satellite has been seen circling an asteroid. A special mirror allowed scientists to find the moon...more

U.S. is Fed Up with Russia

Will Russia ever put the service module for the International Space Station in space? NASA officials are demanding an answer from the Russian government. The necessary service module is currently waiting...more

More on Recent Coronal Mass Ejection

During a period of about two days in early May, 1998, the ACE spacecraft was immersed in plasma associated with a coronal mass ejection (CME). The SWICS instrument on ACE, which determines unambiguously...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF