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2. Solar irradiance - Wikipedia

   en.wikipedia.org/wiki/Solar_irradiance

   Solar irradiance is often integratedover a given time period in order to report the radiant energyemitted into the surrounding environment (jouleper square metre, J/m2) during that time period. This integrated solar irradiance is called solar irradiation, solar exposure, solar insolation, or insolation.

3. Ultraviolet index - Wikipedia

   en.wikipedia.org/wiki/Ultraviolet_index

   The ultraviolet index, or UV index, is an international standard measurement of the strength of the sunburn -producing ultraviolet (UV) radiation at a particular place and time. It is primarily used in daily and hourly forecasts aimed at the general public. The UV index is designed as an open-ended linear scale, directly proportional to the intensity of UV radiation, and adjusting for ...

4. James Webb Space Telescope sunshield - Wikipedia

   en.wikipedia.org/wiki/James_Webb_Space_Telescope...

   The James Webb Space Telescope (JWST) sunshield is a passive thermal control system deployed post-launch to shield the telescope and instrumentation from the light and heat of the Sun, Earth, and Moon. By keeping the telescope and instruments in permanent shadow, it allows them to cool to their design temperature of 40 kelvins (−233 °C; −388 °F). Its intricate deployment was successfully ...

5. List of space telescopes - Wikipedia

   en.wikipedia.org/wiki/List_of_space_telescopes

   List of space telescopes. This list of space telescopes ( astronomical space observatories) is grouped by major frequency ranges: gamma ray, x-ray, ultraviolet, visible, infrared, microwave, and radio. Telescopes that work in multiple frequency bands are included in all of the appropriate sections. Space telescopes that collect particles, such ...

6. Sunrise - Wikipedia

   en.wikipedia.org/wiki/Sunrise

   The Sun appears to rise above the horizon and circle the Earth, but it is actually the Earth that is rotating, with the Sun remaining fixed. This effect results from the fact that an observer on Earth is in a rotating reference frame.

7. Earth's orbit - Wikipedia

   en.wikipedia.org/wiki/Earth's_orbit

   Ignoring the influence of other Solar System bodies, Earth's orbit, also known as Earth's revolution, is an ellipse with the Earth-Sun barycenter as one focus with a current eccentricity of 0.0167.