Answer:

1. A planet’s habitability, or ability to harbor life, results from a complex network of interactions between the planet itself, the system it’s a part of, and the star it orbits. The standard definition for a habitable planet is one that can sustain life for a significant period of time. As far as researchers know, this requires a planet to have liquid water. To detect this water from space, it must be on the planet’s surface. The region around a star where liquid surface water can exist on a planet’s surface is called the “habitable zone.” However, this definition is confined to our understanding of current and past life on Earth and the environments present on other planets. As researchers learn more and discover new environments in which life can sustain itself, the requirements for life on other planets may be redefined.

What makes the Earth habitable? It is the right distance from the Sun, it is protected from harmful solar radiation by its magnetic field, it is kept warm by an insulating atmosphere, and it has the right chemical ingredients for life, including water and carbon. The processes that shape the Earth and its environment constantly cycle elements through the planet. This cycling sustains life and leads to the formation of the mineral and energy resources that are the foundation of modern technological society.

2. They all are terrestrial planets, made of solid rocks and sillicatesThey all have an atmosphere. Venus have CO2 and SO2 l, earth have Nitrogen and Oxygen while mars have CO2

They all almost take the same time to rotate on their axis (23-25 hrs)

Venus is about 95% the size of the Earth and has 82% of the Earth's mass. Like the Earth, Venus has a rocky crust and iron-nickel core. But the similarities stop there. Venus has a thick atmosphere made of 96% carbon dioxide (CO2), 3.5% nitrogen (N2), and 0.5% other gases.

Venus and Mars are indeed not only our closest neighboring planets but the closest ones in size and physical make up. Mars is much smaller than Earth and Venus but it is still in the ballpark, comparatively.

Here are just a few comparisons, by no means an exhaustive listing (nor a very expert one).

Venus does not get the same attention Mars does in terms of its suitability to support a colony. Indeed, today its surface does not seem very welcoming to us with a mean surface temperature of 863 °F. For much of its life, however, according to geophysicists who have studied these things far more than I have, Venus was very much like Earth in terms of its ability to support life. Though Venus’ surface is now a dry desert, it likely had oceans similar to Earth’s in the past.

Explanation:

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