Tag: <span>上海龙凤419Neath</span>

Two New NASA Missions Will Study Solar Weather

first_imgStay on target NASA Says 2 Asteroids Will Safely Fly By Earth This WeekendScientists Discover Possible Interstellar Visitor NASA has selected two new missions to study the Sun and its dynamic effects on outer space.The first focuses on how the brightest star drives particles and energy into the Solar System, while the second looks at Earth’s response.Here’s your science lesson for the day: The Sun generates a vast outpouring of solar particles, known as solar wind, which creates a dynamic system of radiation called space weather.Near Earth, where such particles interact with our planet’s magnetic field, the space weather system can have a profound effect on humans’ everyday lives—impacting radio communications, GPS signals, and utility grids.The more we (i.e. scientists) understand what drives space weather and its interaction with the Earth and lunar systems, the more we (still the scientists) can do to ease its effects. Like ensuring the safety of astronauts and technology crucial to NASA’s Artemis Moon program.“We carefully selected these two missions not only because of the high-class science they can do in their own right,” according to Thomas Zurbuchen, associate administrator for NASA’s Science Mission Directorate. “But because they will work well together with the other heliophysics spacecraft advancing NASA’s mission to protect astronauts, space technology, and life down here on Earth.”PUNCHThe Polarimeter to Unify the Corona and Heliosphere, or PUNCH, mission will focus directly on the Sun’s outer atmosphere, the corona, and how it generates solar wind.Four suitcase-sized satellites will image and track solar wind as it leaves the Sun; the spacecraft will also follow coronal mass ejections (large eruptions of solar material).PUNCH is led by Craig DeForest at the Southwest Research Institute in Boulder, Col. Including launch costs, the project is being funded for no more than $165 million.TRACERSDisappointingly not named “Judy,” TRACERS’ (Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites) primarily role is to observe how magnetic fields around Earth interact with those from the Sun.It will be the first space mission to explore magnetic reconnection—a process in which our planet’s magnetic field lines reconfigure, sending particles out at speeds approaching that of light—with two spacecraft.The program is led by Craig Kletzing at the University of Iowa. Not including rideshare costs, TRACERS is funded for no more than $115 million.“These missions will do big science, but they’re also special because they come in small packages, which means that we can launch them together and get more research for the price of a single launch,” the fiscally responsible Zurbuchen said in a statement.The pair, both managed by the Explorers Program Office at NASA’s Goddard Space Flight Center, are expected to launch no later than August 2022.Join the space agency on Reddit this afternoon for an Ask Me Anything (AMA) session, from 12:30-1:30 p.m. EDT.More on Geek.com:Sun’s Mysterious History Might Be Buried in Moon’s CrustStunning Images of a Sunset on Earth Captured from SpaceUnexpected ‘Plasma Rain’ on Sun Connects Two Solar Mysterieslast_img read more