We can only directly observe the earth's surface and (through mines and wells) get a peek at structures less than half a percent of the way to the center of the planet.
We can observe natural phenomena that bring material up from farther down, such as volcanoes.
We can also use models to predict what earth must be like, knowing the gravity and mass and size of the planet.
We can also use information gained by the reverberations of large surface events to map out the interior of the planet by sonar. In the days of underground nuclear tests, and from modern-day earthquakes, we can see patterns of how compression waves travel and reflect from the interior.
The science involved in this methodology is incomplete and still evolving.
The fact that it exists and is here is interpreted by some
as a strong indication that it had an origin.
Unless you mean astronauts, then no. Unfortunately, no evidence of alien life, not even bacteria, has been found so far.
Sorry. The earths core reminds me of an apple. So here goes. In the center of the apple, there is a core, and that is the hardest a biggest part. So that is the earths core. The crust is the skin of the apple, and that is also the thinnest. The rest is the outer core and mantle.
Venus is closest to the Earths size and mass - often referred to as Earths sister or twin planet. Venus' Mass is around 82% of Earths, while its diameter is a little smaller than Earths at around 95% of Earths.
earths moon is located basicly on the earths gravitational pull called the ionosphere which is the highest magnetic field of earth
Venus is closest to the Earths size and mass - often referred to as Earths sister or twin planet. Venus' Mass is around 82% of Earths, while its diameter is a little smaller than Earths at around 95% of Earths diameter.
Their evidence comes from rocks at earths surface.
Seasons
Techtonic plates
geologist study the earths structure.
physical structure is geology and geology is a movement in the earths crust which is also physical structure.
Geology
mantle
geologist
Seismic waves
meteorites
a. seismic waves b. volcanoes c. earthquakes d. rocks
Rock samples