Space
Venus takes longer to rotate once than to orbit the Sun.
Venus rotates once in about 243 Earth days, while one Venusian orbit takes about 225 Earth days. A sunrise-to-sunset cycle on Venus lasts about 117 Earth days.
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Read today’s fact ↗TODAY’S FACT Tuesday, October 27 · UTC
THE FACT LIBRARY
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Nature#016
An ocean sound channel can carry signals thousands of miles.
NOAA says channeling in the ocean can let sound travel thousands of miles without losing considerable energy.
NOAA National Ocean ServiceRead fact ↗
Science#015
Ocean temperature and pressure shape sound travel.
NOAA explains that water temperature and pressure affect sound speed and distance, and that sound refracts downward and upward around the ocean thermocline.
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Science#014
Sound travels faster in water than in air.
NOAA lists approximate sound speeds of 1,500 meters per second in water and 340 meters per second in air.
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Nature#013
All of Earth’s continents could fit in the Pacific basin.
NOAA states that all of the world’s continents could fit into the Pacific basin.
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Nature#012
The Pacific contains more than half of Earth’s free water.
NOAA says the Pacific Ocean contains more than half of the free water on Earth.
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Nature#011
The Pacific is the largest ocean basin.
NOAA says the Pacific covers approximately 155 million square kilometers (59 million square miles) and is by far the largest of the world’s ocean basins.
NOAA National Ocean ServiceRead fact ↗
Space#010
Saturn’s rings are made of countless pieces of ice and rock.
NASA says Saturn’s rings contain billions of small chunks of ice and rock, ranging from dust-sized grains to pieces as large as a house, with a few as large as mountains.
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Space#009
Saturn had 274 confirmed moons as of March 2025.
NASA’s Saturn facts page states that, as of March 2025, Saturn had 274 confirmed moons in its orbit.
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Space#008
A day on Saturn lasts about 10.7 hours.
NASA gives Saturn a rotation period of about 10.7 hours and an orbital period of about 29.4 Earth years.
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