The ecliptic is the path the sun seems to follow through our sky. Some stars are grouped near the ecliptic, such as the constellations that make up the zodiac.
Two stars orbiting each other are "binary stars" ...a group of stars near each other, may be formally or informally known as a "cluster".
Groups of stars have different names depending on the size and nature of the group. A "really big bunch" of stars is a galaxy. A cluster of stars within a galaxy that are "sort of near each other" might be called a local group. There are examples where several stars might form what is called a multi-star system where they all rotate about a common "gravimetric center".
All of them because they wander around in the sky and move between different constellatons, while the stars stay 'fixed'. They move in orbits round the Sun and all of them keep within a narrow belt of the sky near a line called the ecliptic that defines the plane of the Earth's orbit.
Yes. Over the course of a couple of months, the entire ecliptic, plus a wide swath north and south of it, is visible in the night sky from any point on earth.
All the planets move continuously among the fixed stars, so they were called the wandering stars.The planets all move in or near a fixed plane. As they wander they all appear to stay close to the plane of the Earth's orbit, which is the ecliptic.
Probably you saw the moon next to a planet, or another bright star. There are some bright stars - like Antares - which are near the Ecliptic.
The Matariki is the Māori name for the cluster of stars also known as the Pleiades. The Pleiades are to be found near the plane of the ecliptic and therefore are only seen when Earth is on the same side of the Sun to them. Thus the Matariki can not always be seen in the night sky.
None. planets travel along the ecliptic, which is nowhere near the little dipper.
I assume that you meant to ask "How many stars are 1 light year from the earth?"The answer is none.The closest star to us is Alpha Centauri which is 4 light years away.Unless you count our own sun which is 8 light minutes from the earth.If you meant to ask "How many stars are 1 light year from any other stars?"Then the answer is very many.There are many places within our Milky Way galaxy where stars are close together, especially near the center of the galaxy.
You might confuse Antares with Mars, since (a) it is red, (b) it is bright, and (c) it is near the Ecliptic.
The star Altair stays in one place in the sky, but Venus and Saturn move on (or near) a circle called the ecliptic, like the other planets. But none of the planets goes close to Altair because it is well off the ecliptic.
Actually, it doesn't do so; if it did, there would be a lunar eclipse and a solar eclipse every month. The moon orbits NEAR the ecliptic plane, but not actually in it. The moon's orbit doesn't change because there's no reason for it to change (strictly speaking, it is changing, but it's doing so very, very slowly).