Water has been discovered on which potentially habitable super-Earth?
A. K2-18d
B. K2-18c
C. K2-18a
D. K2-18b
Answer:D
Water has been discovered on which potentially habitable super-Earth?
A. K2-18d B. K2-18c C. K2-18a D. K2-18b
Explanation: Water has been detected by scientists in the atmosphere of a potentially habitable super-Earth. The exoplanet, named K2-18b, is twice the size and eight times the mass of Earth. K2-18b is the first planet outside the solar system in the habitable zone of its star known to have water in its atmosphere.