by a telescope
Ancient India discovered only 5 planets without a telescope, because they could see the planets with their eyes, just as we can. Those planets are:MercuryVenusMarsJupiterSaturn
through a telescope
through a telescope :)
a telescope.
Yes, you can see planets like Mercury and Saturn from Earth as well. In fact, all the planets in our solar system (except for Uranus and Neptune) are visible to the naked eye at certain times of the year. With the help of a telescope, you can also see Uranus and Neptune.
With a powerful enough telescope, you could be anywhere
Asteroids.
Definitely. You can see five planets (in addition to Earth) without a telescope.With your telescope, you can see features on them that your eyes can't detect,like the stripes on Jupiter, the moons around it, and the rings of Saturn. Youjust have to know where to look to find the planets.
the sun, stars, planets, moon, through a telescope
All of them, it just depends on the time of year and the level of light pollution where you are. ================== With only your eyes, you can see six planets. You need a telescope to see the others. Also, it depends on where each planet is in its orbit, not on the time of year.
Probably because without telescopes people wouldn't know that there were other planets (except that in addition to Earth, you can see five other planets without a telescope, but hey . . .)