Planetary. Astronomy. Current Solar Data: NOAA data. Today's Space Weather. The Satellite Environment Plot combines satellite and ground-based data to provide an overview of the current geosynchronous satellite environment.
Click on a data panel to open an updating secondary window. An updating Satellite Environment Plot window is also available. Although these data are of interest to the satellite community, they do not include all parameters and energy ranges known to be associated with satellite anomalies. See related information from the NOAA POES satellite -- Auroral Activity Estimates, Relative Intensities of Energetic Particles, and Solar Protons. Space Weather Monitors- Stanford SOLAR Center. Space Weather Now. SOHO Space Weather. NOAA / NWS Space Weather Prediction Center. News and information about meteor showers, solar flares, auroras, and near-Earth asteroids.
The Sun l Sun Facts and images. Our Sun is a normal main-sequence G2 star, one of more than 100 billion stars in our galaxy. diameter: 1,390,000 km. mass: 1.989e30 kgtemperature: 5800 K (surface) 15,600,000 K (core) History of The Sun The Sun is by far the largest object in the solar system.
It contains more than 99.8% of the total mass of the Solar System (Jupiter contains most of the rest). It is often said that the Sun is an "ordinary" star. The Sun is personified in many mythologies: the Greeks called it Helios and the Romans called it Sol. The Sun is, at present, about 70% hydrogen and 28% helium by mass everything else ("metals") amounts to less than 2%. The outer layers of the Sun exhibit differential rotation: at the equator the surface rotates once every 25.4 days; near the poles it's as much as 36 days.
Conditions at the Sun's core (approximately the inner 25% of its radius) are extreme. The Sun's power (about 386 billion billion mega Watts) is produced by nuclear fusion reactions. NASA SDO - August 1, 2010; The Day Everything Happened. SDO - Solar Dynamics Observatory.
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SDO Animations and Features Gallery. Stanford Solar Observatories Group. Stanford Solar Center. Comet ISON Model.