To hunt for exoplanets, the flowerlike shade would need to stay aligned with a space telescope over vast distances. Recent work demonstrates how that's possible.
The Mars Helicopter - a small, autonomous aircraft that will demonstrate the viability of heavier-than-air vehicles on Mars - has passed several key tests with flying colors.
New observations reveal that water in comets and Earth's oceans may share common composition, suggesting more comets than previously thought could have delivered water to Earth.
