The interior planets consist of Mercury, Venus, Earth, and Mars, which are small, dense, rocky bodies closest to the Sun. Mercury is the smallest with a high metallic composition, while Venus, with a massive atmosphere, has the highest surface pressure; Earth is the only planet known to support life and has a protective ozone layer, and Mars has a thin atmosphere with two moons. The document provides detailed specifications including size, distance from the Sun, and general characteristics for each planet.

1. INTERIOR PLANETS
The interior planets are four planets nearest to
the Sun, that is to say: Mercury, Venus, the
Earth and Mars. They are small and of high
density formed principally by rocky and metallic
materials with a structure differentiated well and
with a similar size.

2. MERCURY
It is the planet of the Solar System most
near the Sun and the smallest. It is the
smallest of the four, with a diameter of 4879
km in the equator. It is formed
approximately by 70% of metallic elements
and 30% of silicates. The density of this
planet is the second biggest of the whole
solar system, being his value of 5430 kg /m³.

3. VENUS
It is a question of a planet of rocky and
terrestrial type. Venus's orbit is an ellipse
with an excentricity of less than 1 %. His
atmospheric pressure is 90 times superior to
the terrestrial one. It possesses the warmest
atmosphere. It is composed by gases as the
carbon dioxide. He is 243 days old, and his
movement turns in the sense of the handles
of the clock.

4. EARTH
The Earth. It is the densest. Nowadays it is the
only astronomic body where the existence of life
is known. It has a cap of ozone. The terrestrial
surface is divided in several tectonic plates. It is
late in giving him a return 365 days. The Earth
possesses the only natural satellite, the Moon.

5. MARS
It has a thin atmosphere formed by carbon
dioxide, and two satellites: Fobos and Deimos.
-Gravity: 3,711 m/s²
- I remove: 3.390 km
- Distance from the
Sun: 227.900.000 km
- Mass: 639E21 kg
- Surface:
144.798.500 km²

6. Name
Average
distance
from sun
Estimated
size
(km)
MERCUR
Y
0,39 4880
VENUS 0,72 12,100
EARTH 1,0 12,700
MARS 1,5 6780

7. Name
Average
distance
from sun
Estimated
size
(km)
MERCUR
Y
0,39 4880
VENUS 0,72 12,100
EARTH 1,0 12,700
MARS 1,5 6780