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Because the solar EUV cannot be monitored from the ground, the joint NASA-ESA Solar and Heliospheric Observatory (SOHO) spacecraft was launched and has provided solar EUV images beginning in 1995. SOHO is a main source of near-real time solar data for both research and space weather prediction and inspired the STEREO mission.
On a prograde planet like the Earth, the sidereal day is shorter than the solar day. At time 1, the Sun and a certain distant star are both overhead. At time 2, the planet has rotated 360° and the distant star is overhead again (1→2 = one sidereal day). But it is not until a little later, at time 3, that the Sun is overhead again (1→3 = one solar day). More simply, 1→2 is a complete ...
The Advanced Composition Explorer (ACE) was proposed in 1986 as part of the Explorer Concept Study Program. ACE is designed to make coordinated measurements of the elemental and isotopic composition of accelerated nuclei from H to Zn spanning six decades in energy per nucleon, from solar wind to galactic cosmic ray energies, with sensitivity and with charge and mass resolution much better than ...
Scientists said the sun is now in its solar maximum, or the peak of its 11-year solar cycle.
Watch time-lapse solar arrays reflecting auroras, city lights ... He explained that he set up the time-lapse over northern Africa amid dark conditions with lightning in an effort to capture the ...
The eclipse will begin in Texas at 1:27 p.m. CDT and end in Maine at 3:35 p.m. EDT, but the exact time of the eclipse varies by where you are in its path. Use this link to search for what we ...
Because solar particles reach L 1 about an hour before Earth, PlasMag can provide a warning of 15 to 60 minutes before a coronal mass ejection (CME) arrives. It does this by measuring "the magnetic field and the velocity distribution functions of the electron, proton and alpha particles (helium nuclei) of solar wind". [26] It has three ...
The Solar X-ray Imager was the first X-ray telescope to take a "full-disk" image of the Sun, providing forecasters with the ability to detect solar storms and real-time solar forecasting by the Space Weather Prediction Center (SWPC). [2]