Answer to Question 1
They were the first spacecraft to soft land on the planet and send images of the surface back to Earth.
Answer to Question 2
Uranus passed in front of a star, and the star's light fluctuated before and after the occultation. These rapid changes were mapped by photoelectric photometry to map the rings. Later observations found them brighter in the infrared, for as the dark material absorbs sunlight, the absorbed energy heats up the rings particles to the point that in the infrared, they are hotter than the planet's surface clouds.
Because of the hazards of a vacuum, astronauts must wear a pressurized space suit while outside thei
Einstein - The important thing...
A passenger train crosses Stony Creek Bridge in the Rocky Mountains in 1878. Railroads were importan
Simple harmonic motion also forms the basis for understanding mechanical waves
Important Trace Elements in the Body
Understanding the Nutrition Facts Panel