Gravity and Inertia keep Earth in orbit
Yes, spot on, good guess . .
Mercury has fastest orbital speed.
Mars has an orbital period of around 687 days.
Almost exactly 88 Earth days.
There are no planets in orbit around the Earth !. Orbiting the Sun - Pluto has the longest orbital period at 248 years - although it has now been declassified as a planet. This leaves Neptune - with an orbital period of just under 165 years.
Yes, spot on, good guess . .
Orbital period is the time it takes a planet to go around its star once.
That is that planet's "year", or its orbital period.
The orbital speed of a planet is the time it takes to cycle around the sun. The spinning speed of a planet is the time it takes for the planet to rotate on it's axis.
Orbital Bodies.
A planet's orbit around the sun is in the shape of an oval.
Mercury has fastest orbital speed.
Mars has an orbital period of around 687 days.
Mercury is the closest planet to the Sun and has an orbital period of 88 Earth days. (Pluto in contrast has an orbital period of about 248 Earth years.)
The velocity a planet travels in it's circle around the Sun
Pluto is the planet that has the lowest orbital velocity relative to that of the earth. The orbital velocity of Pluto is 0.159.
Planets have elliptical orbits around the sun.