What is the surface of Mars like? What is the surface gravity of Halley's Comet? What is the orbital period of Uranus? What is Neptune's radius? What kind of gas is contained inside Uranus? What is Uranus' plane
The moon stabilizes us to keep that nifty 23 degree tilt that makes for mild seasons and environments. Without the moon, we might be careening from upright to sideways. With a near-zero degree tilt we'd barely see a few minutes of sun or — like Uranus, with its 97-degree tilt — ...
Which planet has a larger diameter: Neptune or Uranus? What planet does Pluto orbit? Is Uranus the largest planet? What type of planet is Neptune? Is Uranus the farthest planet from the sun? What planet has the moon Charon? What planet has four moons?
The rings around Uranus, probably made of dirty ice, are thinner and darker than those aroundSaturn. A Uranus orbiter would look for “ripples” in them, akin to waves on a lake. Finding them would let scientists use the ringsas a giant seismometerto help us learn aboutthe interior of Ur...
Uranus also rotates in the opposite direction as Earth does, and on its side. Scientists think both Uranus' and Venus' original rotations might have been "stopped" by one large impact, several smaller impacts, or a disruption in their rotations by a large gravitational force. In Venus' case...
I was shepherding editor for Shannon Hall’s lovelyMarch 2017 cover storyon super-Earths. Super-Earths are planets larger than Earth but smaller than Uranus and Neptune. There’s nothing like them in the solar system (as far as we know), yetthey’re the most common type of planet discover...
Human health as a constraint on settlement Surface gravities in this solar system between 0.09 and 2.3g all fit into three fairly tight clusters, near Moon, Mars, or Earth gravity. Venus, Saturn, Uranus, and Neptune each have within 12% of 1g. But all four pose many serious challenges, ...
(Confusingly, little Mercury is the closest world to Earth most of the time, but we're getting off-track.) Mercury, Venus, Earth and Mars are the solar system's four inner planets. Beyond Mars lie the outer planets: Jupiter, Saturn, Uranus and Neptune. In terms of size, Earth compares...
What is the gravitational force of the moon? How much does the Earth weigh? How much does the planet Mercury weigh? If you weighed 110 pounds on Earth, how many pounds would you weigh on Jupiter? What is the surface of the moon like?
What is the gravity on the moon? Why does the moon have more craters than Earth? What is the surface of Mercury like? What is the difference between a moon and a planet? What is the surface area of Uranus? What is a lunar crater? What does a waning gibbous moon look like? What is...