brightness, lines on them, and how old they are
The website "The Planets Today" has a wonderful selection of images which can be seen online. This includes a live view of the line-up of the planets, and also information about the Voyager spacecraft missions.
No. When looking at venus through UV imaging, the clouds in the atmosphere is what is picked up, not the planets suface features.
Planets and moons can be seen because of the light that shines off of them in space.
Images of bryophytes can be seen on Yahoo Images or Google Images. Pictures may also be seen on the LLBC website or on the Encyclopedia Britannica website.
The number of planets never seen could be millions, billions, or trillions. We just have never seen them.
Earth
The planets shine because they reflect sunlight.
2012
7 images.
5 images are seen
yep
planets