It could be a lunar eclipse (when the earth is in between both the sun and the moon) or a solar eclipse (when the moon is in between both the earth and the sun).
When the Sun, Earth, and Mars are in a straight line, it is known as a "conjunction." This alignment occurs periodically due to the orbits of the planets around the Sun.
It could be a lunar eclipse (when the earth is in between both the sun and the moon) or a solar eclipse (when the moon is in between both the earth and the sun).
The angle between the line from Earth to Jupiter and the line from Earth to the Sun when Jupiter is at opposition is 180 degrees. This is because Jupiter, Earth, and the Sun are aligned in a straight line during opposition, with Earth in the middle.
An imaginary straight line around which an object like Earth rotates is called its axis. Earth's axis is an imaginary line that runs from the North Pole to the South Pole, around which the planet rotates as it orbits the Sun.
An eclipse is when the earth, moon and sun are all in a straight line, from earth it looks like the sun has turned dark!
Either a Solar Eclipse- (Sun-Moon-Earth) or a Lunar Eclipse- (Sun-Earth-Moon). These are both straight lines.
All three in a straight line, with the Moon between the Earth and the Sun.
Eclipse
Gravitational Force is what pulls the Earth towards the Sun. The "force" pulling it away from the Sun is centrifugal force, but is actually better described as inertia...the tendency of a moving body to continue moving in a straight line. Look at it this way...the Earth, due to inertia, wants to go in a straight line into space, but the Sun's gravity is pulling it towards it. The two forces are equal so the Earth remains in a constant orbit around the sun. The apparent "force" that is keeping the Earth in orbit and offsets the Sun's gravity is called centrifugal force, but is really nothing more than the Earth's inertia trying to move it in a straight line. See the included link for more information.
It prevents the earth from spinning off in a straight line away from the sun instead of falling back into the sun.
All three in a straight line, with the Moon between the Earth and the Sun.
Both lunar and solar eclipses are the result of positioning 3 astronomical bodies (earth, sun and moon) in a straight line relative to the observer. A solar eclipse is observed when the sun, moon, and earth are positioned in a straight line with an observer on the earth. A lunar eclipse is observed when the sun, earth, and moon are in a straight line with an observer on the earth. A lunar eclipse, as observed by an observer on the earth would appear as a solar eclipse as observed by an observer on the moon.