Everything is mostly space. The diameter of the sun is 865 thousand miles, which is a bit under a million. The radius of the earth's orbit is 93 million miles, almost 100 million. Sedna, which isn't even outside the solar system, orbits 900 times as far (currently).
Think of it as the planets being the electrons: Earth, Venus, Mars etc.... and the Sun being the nucleus. The size of the Sun and planets relative to the empty space in the solar system is small. It's the same kind of idea with atoms.
Telescopes are used mostly to explore our solar system.
The solar system for the most part is just floating in the universe, in the Milky Way Galaxy. The Milky Way is under Earth,(sort of) and the universe is under the Milky Way.
The sun's flares mostly emit from its atmosphere, specifically from its outer layers known as the corona. These solar flares consist of bursts of energy and charged particles that are released into space.
Jupiter is the largest planet of the solar system. The second largest is Saturn.
There is empty space behind the sun, extending out into the vastness of the solar system and beyond. From Earth's perspective, the sun appears to be at the center of our solar system with planets orbiting around it.
There is no special "corridor", there is more or less empty space all around. You might talk about the orbit of the Solar System around the galactic center.
The solar system is not crowded. There is a huge amount of empty space between planets.
Empty space.
The space in our solar system is filled mostly with vacuum, meaning it is mostly empty of matter. There are some particles, such as gas and dust, but they are sparsely distributed. The solar system is defined by the gravitational influence of the Sun, which keeps the planets and other objects in orbit.
In the outer realms of the solar system.
A planet is more compact. A solar system contains a star, several planets, and a bunch of empty space in between.
Think of it as the planets being the electrons: Earth, Venus, Mars etc.... and the Sun being the nucleus. The size of the Sun and planets relative to the empty space in the solar system is small. It's the same kind of idea with atoms.
The reason the remainder of the observable solar system appears black despite the highly luminous star at its center can be attributed to the properties of electromagnetic radiation, which continues to propagate outward in all directions in empty space until interrupted by a body which might scatter or reflect such radiation back to an observer on Earth. To be more precise, there is indeed some minor amount of scattering making the solar system not entirely "black" - such as Zodiacal light, or Gegenschein, which is sunlight scattered by small amounts of dust mostly in or near the plane of the ecliptic.
The solar system doesn't have an atmosphere, it occupies a piece of space which is an empty vacuum. Each planet may have its own atmosphere, a layer of gas at the surface.
Jupiter
near other stars or in empty space