A NASA spacecraft erected a large, foil solar sail in orbit around Earth last week, after a failed attempt days earlier. However, subsequent …
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NASA's Cutting-edge Solar Sail Is Tumbling Through Space
A NASA spacecraft that recently unfurled a state-of-the-art solar sail in Earth orbit is "tumbling or wobbling" through space as it circles our planet, new observations show. NASA representatives told Live Science that the unusual motion was expected but did not explain exactly what is happening.
Some experts believe that the solar system's hypothetical ninth planet could be just a few years away from being discovered. If this is the case, how …
Astronomers are proposing a new, more quantitative definition of what makes a planet. The new definition looks more directly at the object's mass — …
It may initially seem like a simple question, but determining which planet is closest to Earth is surprisingly tricky and can have multiple correct …
Astronomers have been scouring the outer solar system for signs of a hypothetical ninth planet for almost a decade, without success. However, we may …
