Earth
Planets and moons can be seen because of the light that shines off of them in space.
The number of planets never seen could be millions, billions, or trillions. We just have never seen them.
The planets shine because they reflect sunlight.
yep
I guess you mean how many planets can be seen from the US. In general, only five of the 8 planets in our solar system are sufficiently bright to be visible to the naked eye. These planets are: Mercury , Venus, Mars, Jupiter and Saturn. These planets can also be seen from the US.
every single one.
a person who studies planets is a planetologist.
There are 5 planets that- at different times- can be seen with the naked eye. Mercury is one of the 5- no telescope needed.
brightness, lines on them, and how old they are
we can see 6 planets mercury venus mars jupiter saturn
Planets can be seen from Earth because they reflect sunlight, making them visible in the night sky. The planets in our solar system are relatively close to Earth, which allows them to be seen without a telescope or binoculars. Their brightness and position change as they move along their orbits around the Sun.
Believe it or not Voyager is only seen landing on six different planets.