Ionized atoms ejected from a dying star form the bright swirling clouds of this planetary nebula. Named Kohoutek 4-55, the nebula was captured by the Hubble Space Telescope. Planetary nebulae like ...

Humanity is entering one of the most active eras of space missions ever recorded. From deep-space probes studying ancient cosmic history to robotic explorers targeting moons, asteroids, and Mars, 2025 ...