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  2. Planetshine - Wikipedia

    en.wikipedia.org/wiki/Planetshine

    Clementine's camera reveals (from right to left) the Moon lit by earthshine, the Sun's glare rising over the Moon's dark limb, and the planets Saturn, Mars, and Mercury (the three dots at lower left). Planetshine is the dim illumination, by sunlight reflected from a planet, of all or part of the otherwise dark side of any moon orbiting the body.

  3. Earthlight (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Earthlight_(astronomy)

    Earthshine (an example of planetshine), also known as the Moon's ashen glow, is the dim illumination of the otherwise unilluminated portion of the Moon by this indirect sunlight. Earthlight on the Moon during the waxing crescent is called "the old Moon in the new Moon's arms", [ 1 ] while that during the waning crescent is called "the new Moon ...

  4. List of gravitationally rounded objects of the Solar System

    en.wikipedia.org/wiki/List_of_gravitationally...

    According to the IAU's explicit count, there are eight planets in the Solar System; four terrestrial planets (Mercury, Venus, Earth, and Mars) and four giant planets, which can be divided further into two gas giants (Jupiter and Saturn) and two ice giants (Uranus and Neptune). When excluding the Sun, the four giant planets account for more than ...

  5. Albedo - Wikipedia

    en.wikipedia.org/wiki/Albedo

    A layer of snowfall increases local albedo, reflecting away sunlight, leading to local cooling. In principle, if no outside temperature change affects this area (e.g., a warm air mass ), the raised albedo and lower temperature would maintain the current snow and invite further snowfall, deepening the snow–temperature feedback.

  6. Night sky - Wikipedia

    en.wikipedia.org/wiki/Night_sky

    Paranal Observatory nights. [3] The concept of noctcaelador tackles the aesthetic perception of the night sky. [4]Depending on local sky cloud cover, pollution, humidity, and light pollution levels, the stars visible to the unaided naked eye appear as hundreds, thousands or tens of thousands of white pinpoints of light in an otherwise near black sky together with some faint nebulae or clouds ...

  7. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    Thus, the Sun occupies 0.00001% (1 part in 10 7) of the volume of a sphere with a radius the size of Earth's orbit, whereas Earth's volume is roughly 1 millionth (10 −6) that of the Sun. Jupiter, the largest planet, is 5.2 AU from the Sun and has a radius of 71,000 km (0.00047 AU; 44,000 mi), whereas the most distant planet, Neptune, is 30 AU ...

  8. ‘Sleep Revolution Cheat Sheet’ by Huffington Post

    testkitchen.huffingtonpost.com/sleep-revolution...

    teens and sleep. sleep deprived vs. drunk. caffeine. i gave up coffee. college and caffeine. sleeping pills. sleeping aid myths. ... getty images & the noun project ...

  9. Terminator (solar) - Wikipedia

    en.wikipedia.org/wiki/Terminator_(solar)

    These particles scatter the light, reflecting some of it to the ground. Hence, the sky can remain illuminated even after the sun has set. Images showing a planetary terminator can be used to map topography: the position of the tip of a mountain behind the terminator line is measured when the Sun still or already illuminates it while the base of ...