While journeying through the far reaches of the solar system, the New Horizons probe picked up a dusty trail of icy fragments that may indicate that the Kuiper Belt—home to former planet Pluto and countless other objects—is way bigger than we thought.
For centuries, astronomers were limited to ground-based observations of the planets, but now we use spacecraft to capture close-up views of our neighboring worlds. Excitingly, our views of solar system planets have been getting progressively better over the decades, as these images attest.
A famous NASA spacecraft will continue exploring the outer reaches of the solar system thanks to an extended lifeline. This decision overturns NASA’s earlier proposal to change the mission’s course and transfer it to a different division.
