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.
Artist's conception of the New Horizons spacecraft passing over Pluto, showing its tenuous atmo
Venus Looking Glass
Vesalius’s De Humani Corporis Fabrica was an important early work on the human species.
Hydrolysis reactions for some biochemically important phosphate compounds (part 3)
When viewed from the Earth, Venus subtends an angle of about 1 arcminute (1/60°) when it is at ...
My dad is important to me