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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Space#007
Saturn is the sixth planet from the Sun and the second largest.
NASA describes Saturn as the sixth planet from the Sun and the second-largest planet in our solar system.
NASARead fact ↗
Animals#006
Female paper nautiluses make a buoyancy-aiding egg case.
The Smithsonian identifies the paper nautilus, or argonaut, as an octopus whose female secretes a thin egg case that can trap air and help with buoyancy.
Smithsonian OceanRead fact ↗
Animals#005
Cephalopod blood is blue because it uses copper-based hemocyanin.
The Smithsonian says cephalopod blood is blue and uses the copper-based oxygen carrier hemocyanin rather than iron-based hemoglobin.
Smithsonian OceanRead fact ↗
Animals#004
Octopuses have three hearts.
The Smithsonian explains that two branchial hearts push oxygen-depleted blood through the gills, while a systemic heart pumps oxygenated blood through the body.
Smithsonian OceanRead fact ↗
Space#003
Venus has a named quasi-satellite but no moon.
NASA says Venus is one of two planets without a moon and identifies Zoozve as its quasi-satellite, an object that orbits the Sun while staying close to Venus.
NASARead fact ↗
Space#002
Venus spins in the opposite direction from Earth.
NASA describes Venus as spinning backward compared with Earth, so the Sun would rise in the west and set in the east.
NASARead fact ↗
Space#001
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.
NASARead fact ↗
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