This week, NASA has discovered great similarities between the Earth and Mars and Pluto. But when it comes to the potential for life, Mars is an increasingly hot favourite.
Pluto's moon Charon seems to have had a violent past, with icy volcanoes leaving huge fractures.
From a mysterious haze to strange nitrogen snowfall, the latest pictures of Pluto pose many new questions.
What does it take to devote your life to a work goal with such a long time horizon you might never reach it in your lifetime?
Space scientists have a busy decade ahead with plans to visit Jupiter, Mars, Mercury and other interplanetary bodies all on the cards.
In the long lead-up to our ultimate flyby of Pluto, space science has reconfigured our notions of what it means to be a solar system, a planet, a world.
The existence of a "Planet X" in the outer solar system was the subject of great speculation, and was finally settled with the discovery of Pluto in 1930.
From Twinkle Twinkle to Space Odyssey and beyond, humans have always turned to music to help deal with the profoundly confronting enormity of the cosmos. Is that a match made in the heavens?
Photos from the spacecraft's close approach are dazzling. They and other data from the mission will fill in some of the blanks about Pluto and provide a snapshot of the infant solar system.
What can the data from New Horizons tell us about the dwarf planet's five moons?
Lack of impact craters intrigues space experts who say it suggests the dwarf planet may be geologically active.
New Horizons mission members have worked on the project for even longer than it's taken the spacecraft to get to Pluto. They've planned, built and researched – and now their efforts are paying off.
Everything in space is so far away, but probes bring us closer.
Now the flypast of Pluto is over the space probe New Horizons will begin sending the data back to Earth. It will take many months but what will it reveal about the dwarf planet?
Exactly half a century ago the US Mariner 4 made the first flyby of Mars. But why are we still doing flybys today?
After a decade in space, New Horizons has finally completed its fly-by of Pluto. And the fact that it is no longer a planet makes it all the more interesting.
Join Tanya Hill as she live blogs the New Horizons flyby of Pluto at 9.30pm AEST tonight.
NASA's New Horizons spacecraft is nearly two decades old. Is that a problem?
The New Horizons spacecraft is only hours away from its closest approach to Pluto. It's hoped the brief encounter will help answer many questions about the oddball member of our solar system.
Pluto is one of the most enigmatic objects in our solar system, and its secrets are soon to be uncovered by the New Horizons probe.