HS-ESS1-4
Use mathematical or computational representations to predict the motion of orbiting objects in the solar system.
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PlanetsCatching a Comet’s Tail
A closeup visit by a NASA spacecraft helps show how a comet gets its shape.
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SpaceBig galaxy swallows little galaxy
Astronomers find a convincing case of a large galaxy caught in the act of eating a smaller one.
By Emily Sohn -
PlanetsA planet’s slim-fast plan
A planet orbiting very close to its sun can quickly lose weight.
By Emily Sohn -
SpaceBlack holes that burp
Some black holes in outer space may actually spit out as much material as they suck in.
By Emily Sohn