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Looking Back at Uranus
Topic: Outer Solar System
Twenty-five years ago, NASA made its only visit thus far to the planet Uranus. Voyager 2 returned unexpected images of an active planet and moons with dramatic surface features. The visit expanded our knowledge of the planets and helped astrobiologists understand whether or not planets and moons in the outer Solar System could be habitable.

Voyager Crosses the Point of Solar Stillness
Topic: Outer Solar System
NASA's Voyager 1 spacecraft has reached a point at the edge of our solar system where there is no outward motion of solar wind. The craft is getting closer and closer to interstellar space. For 33-year years, Voyager 1 has provided incredible data about the structure of our solar system and many of the outer planets and moons.

The Ever-Changing Edge of the Solar System
Topic: Outer Solar System
New data from NASA's IBEX spacecraft reveals that the edge of our solar system is a more dynamic place than previously thought. The research is shedding new light on our solar system, and can help astrobiologists better understand the conditions that allowed the Earth to become a habitable world.

New Objects Hidden in Hubble Data
Topic: Outer Solar System
With some clever science, astronomers have re-examined data archives from the Hubble Space Telescope and discovered 14 new trans-Neptunian objects. These objects rest beyond the orbit of Neptune and can teach us a great deal about the history of the Solar System and the materials that could have been delivered to the early Earth.

Voyager 2 in Trouble?
Topic: Outer Solar System
The Voyager 2 spacecraft, launched in 1977, is now having problems talking to Earth. Engineers are trying to figure out how to resume normal communications with this envoy at the edge of the solar system.

Picking Planets from Potatoes
Topic: Outer Solar System
New research indicates that there may be many more dwarf planets similar to Pluto in our solar system than previously thought. Studying these distant objects can help astrobiologists understand the basic properties of our solar system and the effects that dwarf planets might have on other celestial bodies, such as Earth.

Summer on Triton
Topic: Outer Solar System
The first ever infrared analysis of the atmosphere of Neptune's moon Triton has shown that summer is in full swing in its southern hemisphere. Observations revealed season variations in carbon monoxide and methane in the moon's thin atmosphere.

A New Peek at Pluto
Topic: Outer Solar System
New images from the Hubble Space Telescope show that Pluto is undergoing seasonal changes. This change of seasons is evident in the surface color and brightness of the dwarf planet. The images are helping scientists understand planetary processes in our solar system, and will be used to calculate exposure times for the cameras aboard NASA's New Horizons missions when it arrives at Pluto.

Haumea Hot Spot
Topic: Outer Solar System
A dark red spot discovered on the dwarf planet Haumea, which orbits beyond Neptune, appears to be rich in minerals and organic compounds. Studying the composition of objects like Haumea can help astrobiologists understand the inventory of compounds in our solar system that may have played a role in life's origins.

Catching Pluto's Breath
Topic: Outer Solar System
Scientists have made surprising discoveries about the atmosphere of the dwarf planet Pluto. The atmosphere contains unexpectedly large amounts of methane and is much warmer than the surface of Pluto itself.

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