... Particularly strange is the green auroral ring caused by ionized oxygen high in the Earth's atmosphere. M57: The Ring Nebula . ... During this Apollo 11 mission, Neil Armstrong (the first person to walk on the moon) and Buzz Aldrin landed on the Moon while Michael Collins circled in the Command Module above. ... Some locations on Earth were able to witness a rare double conjunction eclipse, where the Moon occulted both Jupiter and Venus at the same time. IC 4406: A Seemingly Square Nebula . ...