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Olympus Mons on Mars Is So Large You Cannot See Its Peak from Its Base
Olympus Mons is the tallest volcano in the solar system at 21.9 kilometers high — nearly three times the height of Everest. Its base is so wide (600 km across) that the curvature of Mars hides the summit from anyone standing at the edge.
Why It’s Fascinating
If you stood at its base, you would not know you were on a mountain. The slope is so gradual — about 5 degrees — that it would feel like standing on a gently tilted plain. Mars's lower gravity and lack of tectonic plates allowed it to grow to a size impossible on Earth.
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There Is a Planet Where It Rains Glass Sideways
HD 189733b, located 63 light-years away, has winds exceeding 8,700 kilometers per hour that blow molten silicate glass horizontally. The planet appears deep blue, not from water, but from the light-scattering properties of the glass particles in its atmosphere.
There Is a Giant Cloud of Alcohol in Space
Sagittarius B2, a molecular cloud near the center of the Milky Way, contains billions of liters of methanol and ethanol. The ethanol cloud alone spans 288 billion miles across.
Neutron Stars Are So Dense a Teaspoon Would Weigh 6 Billion Tons
When massive stars collapse, protons and electrons are crushed together into neutrons, creating matter so dense that a sugar-cube-sized piece would weigh about 6 billion tons — roughly the weight of Mount Everest.
Voyager 1 Is Still Sending Data from Interstellar Space
Launched in 1977, Voyager 1 entered interstellar space in 2012 and continues transmitting data from over 24 billion kilometers away. Its radio signals, traveling at the speed of light, take over 22 hours to reach Earth.
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