My English Diary: How we''ll find life on other planets

To search another planet in the universe where life exists is not easy.
To do this some astronomers follow this rule:

• the planets should have "flowing water"
• it must orbit at the right distance from its star

But this is not correct. There are many other factors besides distance from its star that control whether a planet can support life.

Take for example Venus, its distance is inside the parameters but measurements revealed a different story. The surface temperature is 500 degrees Celsius.
It's also important to consider the dimension of the planet and the atmosphere.
But to studying atmosphere there is a big issue: the distance between the planets and us.
In order to know the atmosphere of these planets we need to show how the light is reflected or absorbed. This determins the colors of these planets.
But is very difficult because it's like "trying to see a fruit fly passing in front a car's headlight. Imagine that car is 100 trillion miles away and you want to know the precise color of that fly"
So a computer model was made to calculate the kind of planets atmosphere would need to host life.

Link: How we'll find life on other planet