Planets
Analyze This: Some 5,000 planets orbit stars other than our sun
A new cache of confirmed exoplanet discoveries marks a milestone in planets found beyond our solar system.
HS-ESS1-4
Use mathematical or computational representations to predict the motion of orbiting objects in the solar system.
More Stories in HS-ESS1-4
-
SpaceSpace trash could kill satellites, space stations — and astronauts
As private companies prepare to sprinkle space with tens of thousands of satellites, experts worry about the mushrooming threat of space junk.
-
PhysicsScientists Say: Dark Energy
Dark energy is the unknown force causing the universe to expand faster and faster.
-
PhysicsExplainer: Gravity and microgravity
The force of gravity holds us on the ground, keeps planets in orbit and extends throughout space. A very weak gravitational pull is called microgravity.
-
SpaceThe long-awaited James Webb Space Telescope has a big to-do list
The James Webb Space Telescope has been in the works for so long that new fields of science have emerged for it to study.
-
SpaceAstronomers may have found first known planet in another galaxy
The spiral-shaped Whirlpool galaxy may be home to the first planet spotted outside our own Milky Way galaxy.
-
PlanetsPluto is no longer a planet — or is it?
In the 15 years since Pluto lost its status as a planet, some scientists continue to use whatever definition works best for them.
-
EarthLet’s learn about meteor showers
Meteor showers happen when Earth’s orbit passes through trails of debris left behind by comets or asteroids.
-
OceansMoon’s orbital wobble can add to sea-level rise and flooding
In a dozen years or so, the tide-enhancing effects of a wobble in the moon’s orbit should lead to dramatically higher sea levels in some coastal cities.
-
SpaceThis image may be the first look at exomoons in the making
These observations offer some of the best evidence yet that planets around other stars have moons, or exomoons.