2012
The first spacecraft to land successfully on Mars was Viking 1 in 1975
The spacecraft with Neil Armstrong, Buzz Aldrin, and Micheal Collins on it.
The first spacecraft to observe the dark side of the Moon was the Soviet Luna 3 probe in 1959. It captured the first images of the far side of the Moon and transmitted them back to Earth using a radio transmitter. These images provided valuable insights into the previously unseen hemisphere of the Moon.
No person has ever stepped foot on Saturn as it is a gas giant with no solid surface. The only spacecraft to have visited Saturn is NASA's Cassini spacecraft, which orbited the planet and sent back valuable data and images.
The first spacecraft to soft-land on the moon was the Soviet Union's Luna 9 in 1966. It successfully landed on the lunar surface and transmitted images back to Earth.
2012
The first spacecraft to land successfully on Mars was Viking 1 in 1975
Landsat.
The spacecraft with Neil Armstrong, Buzz Aldrin, and Micheal Collins on it.
The Soviet spacecraft Luna 9 was the first to perform a successful soft landing on the Moon on February 3, 1966. It transmitted images back to Earth from the lunar surface.
The first spacecraft to observe the dark side of the Moon was the Soviet Luna 3 probe in 1959. It captured the first images of the far side of the Moon and transmitted them back to Earth using a radio transmitter. These images provided valuable insights into the previously unseen hemisphere of the Moon.
No person has ever stepped foot on Saturn as it is a gas giant with no solid surface. The only spacecraft to have visited Saturn is NASA's Cassini spacecraft, which orbited the planet and sent back valuable data and images.
The first spacecraft to visit Mars was Mariner 4. It was launched in 1964 and conducted a flyby of Mars in 1965, sending back the first close-up images of the planet's surface.
Voyager 2 :) Continue your homework
The first spacecraft to soft-land on the moon was the Soviet Union's Luna 9 in 1966. It successfully landed on the lunar surface and transmitted images back to Earth.
There are several such planets. As far as I know, at present they are: Mercury, Venus, Earth, Mars, and Saturn.
Satellite pictures of Earth and other planets are captured by cameras or sensors onboard spacecraft and satellites in orbit. These images are then transmitted back to Earth using radio waves or other communication methods. Data is received by ground stations that can decode and process the information to create the images we see.