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How many planets did ptolemy know about when he drew his map of the solar system?
Ptolemy knew about five planets when he drew his map of the solar system: Mercury, Venus, Mars, Jupiter, and Saturn. At the time, these were the only planets visible to the naked eye and were considered part of our solar system.
How did ancient scientists know that there are nine planets in the solar system without having any special equipment?
Ancient astrologers only knew about 5 planets plus Earth. They knew about the 5 planets from visual observation.Furthermore, there are only 8 planets in our solar system.
Which solar system has 62 moons?
There is only one Solar System; it is the star system with the star named Sol (our solar system). It is technically incorrect to refer to any other star system as 'a solar system.' Our star system is is also the only star system we know intimately enough (in fine enough detail) to know to have moons. It is not currently possible for us to detect moons orbiting extrasolar planets (planets orbiting other stars). There are 336 objects classified as moons in the Solar System.
What is the difference between a geocentric model and heliocentric model of the solar system?
Heliocentric was thought to believe that the sun was at the center of the solar system and that the planets revolved around the Sun. Geocentric was thought to believe that the earth was the center of the solar system and that the planets revolved around the earth. We now know that our solar system is centered around the sun and is heliocentric.
How many solar system are in a galaxy?
Our galaxy has over 200 billion stars; many of them do have planets, and thus qualify as a "solar system". As to the total number, we will never know, as solar systems will live and die. As a rough guess, at least 50% of all stars should have planets - so that could be classified as a "Solar System".
How many planets did ptolemy know about when he drew his map of the solar system?
Ptolemy knew about five planets when he drew his map of the solar system: Mercury, Venus, Mars, Jupiter, and Saturn. At the time, these were the only planets visible to the naked eye and were considered part of our solar system.
9 P in the SS?
nine planets in the solar system
Who knows about the planets of our solar system?
Many astronomers, historians, regular people, and scientisis know about the planets in our Solar system.
Are there planets outside the solar system and could any support life?
Well, there are planets outside of the solar system, and there is one that is livable, but I don't know what it is called.
Is planets just your solar system?
your question is worded awkwardly (& i know that's just wikianswers), but it sounds like you're asking "are planets only in our solar system" -- no
Can plants grow on planets?
So far as we know none of the planets in the solar system are able to support plants as we know them on earth.
Why are scientists looking for planets outside the solar system?
to make sure that every one know there are more planets
What are the different kinds of solar system?
"solar system" is the term used to describe planets orbiting a star. We know that planets also orbit binary and tertiary star systems, these would be different kinds of solar systems.
How much planets do we now?
We know of eight (8) in our solar system, and we know of a few hundred other stars that have planets although we can't actually see the planets.
Why are we a heliocentric solar system an not a geocentric solar system?
because heliocentric means " sun is the center of the universe" and geocentric means "earth is the center of the universe" so if you know about the solar system you should know that the sun is the center of the solar system
What do you know about the solar system?
that all the planets orbit around the sun, and that orbit's are not circular.
Why is the earth different from the planets in the solar system?
It is the only planet that we know of that contains life.
