There are four seasons: Spring, Summer, Fall, and Winter.
Because of how the Earth is tilted on its axis, if you live in the Northern hemisphere (the top half of the planet) and it is currently Summer, then those that live in the Southern hemisphere (the bottom half) are experiencing Winter. Cool, huh?
There are twenty four hours in a 'day', and the Earth has many different time zones as well. The Prime Meridian (Greenwich, England) is the complete opposite of the International Dateline (Pacific Ocean, thereabouts. I need to get my facts straight heh.)
It takes 365 days for Earth to fully orbit the sun. Though that's not quite precise enough of a measurement, and so every four years, we have leap year, which is a year where we add on a day (to February) to make up the difference.
We have only one satellite moon, and it is the Moon. hehe. The moon spins just so on its axis so that one half is always facing Earth, while the other half (the 'dark side' of the moon) faces...not Earth.
Below it lists in kilometers how far from the sun we are; translated to miles, it should be about 93,000,000. And that's what an AU (astronomical unit) is.
So when they say Pluto is generally 40 AU from the sun, you get a better idea of just how far out our little solar system goes. :D
|Mass (Earth = 1)||1.0000e+00|
|Equatorial radius (km)||6,378.14|
|Equatorial radius (Earth = 1)||1.0000e+00|
|Mean density (gm/cm^3)||5.515|
|Mean distance from the Sun (km)||149,600,000|
|Mean distance from the Sun (AU)||1.0000|
|Rotational period (days)||0.99727|
|Rotational period (hours)||23.9345|
|Orbital period (days)||365.256|
|Mean orbital velocity (km/sec)||29.79|
|Tilt of Axis (degrees)||23.45|
|Orbital inclination (degrees)||0.000|
|Equatorial escape velocity (km/sec)||11.18|
|Equatorial surface gravity (m/sec^2)||9.78|
|Visual geometric albedo||0.37|
|Mean surface temperature||15°C|
|Atmospheric pressure (bars)||1.013|