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  2. Don't Miss it! The Moon and Mars Will Form a Rare ... - AOL

    www.aol.com/dont-miss-moon-mars-form-162036046.html

    Mars and the moon will be about four degrees apart on Wednesday evening. ... If the sky isn't clear tonight, you may still be able to see Mars over the coming weeks as its brightness gets even ...

  3. Water on terrestrial planets of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Water_on_terrestrial...

    The current Venusian atmosphere has only ~200 mg/kg H 2 O(g) in its atmosphere and the pressure and temperature regime makes water unstable on its surface. Nevertheless, assuming that early Venus's H 2 O had a ratio between deuterium (heavy hydrogen, 2H) and hydrogen (1H) similar to Earth's Vienna Standard Mean Ocean Water of 1.6×10 −4, [7] the current D/H ratio in the Venusian atmosphere ...

  4. A Cold Moon and Mars in retrograde? How to watch tonight’s ...

    www.aol.com/cold-moon-mars-retrograde-watch...

    A Cold Moon only happens once a year while Mars is in retrograde every 26 months. On Wednesday night, the two events will collide.

  5. Extraterrestrial vortex - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_vortex

    Measurements today from telescopes have measured a diameter of 1.3 Earths wide. [16] Oval BA (or Red Spot Jr.) is the second-largest storm on Jupiter and formed from the merging of 3 smaller cyclones in 2000. It is located just to the south of the Great Red Spot and has been increasing in size in recent years, slowly turning a more uniform ...

  6. Watch Venus and Mars align in a planetary conjunction tonight

    www.aol.com/news/watch-venus-mars-align...

    Earth's cosmic next-door neighbors will appear in the sky only a finger's width apart on July 12.

  7. Extraterrestrial atmosphere - Wikipedia

    en.wikipedia.org/wiki/Extraterrestrial_atmosphere

    The average surface pressure on Mars is 0.6-0.9 kPa, compared to about 101 kPa for Earth. This results in a much lower atmospheric thermal inertia, and as a consequence Mars is subject to strong thermal tides that can change total atmospheric pressure by up to 10%. The thin atmosphere also increases the variability of the planet's temperature.

  8. Astronomy on Mars - Wikipedia

    en.wikipedia.org/wiki/Astronomy_on_Mars

    Mars has an axial tilt of 25.19°, quite close to the value of 23.44° for Earth, and thus Mars has seasons of spring, summer, autumn, winter as Earth does.As on Earth, the southern and northern hemispheres have summer and winter at opposing times.

  9. Green comet - latest: Mars and the Moon could make now ... - AOL

    www.aol.com/green-comet-latest-mars-moon...

    Our lunar neighbour has been crowding out the view – but it is finally giving way to rare visitor