# Kepler-452b

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## 10 Questions

1.04 AU

Cygnus

### How many times is the mass of Kepler-452b compared to Earth's mass?

At least five times

### What is Kepler-452b also known by?

Its Kepler Object of Interest designation KOI-7016.01

### Is Kepler-452b entirely habitable?

Unknown, as it is receiving slightly more energy than Earth

Ellipse

### What did Kepler's laws replace in the heliocentric theory of Nicolaus Copernicus?

Circular orbits and epicycles

### What does Kepler's second law establish about a planet's velocity?

It travels faster when closer to the Sun

### What does Kepler's third law express about a planet's orbital period and the length of its orbit?

The square of the orbital period is proportional to the cube of the length of the semi-major axis

### What did Kepler infer about the orbits of other bodies in the Solar System based on his calculations of the orbit of Mars?

They also have elliptical orbits

## Study Notes

### Kepler-452b Characteristics

• Kepler-452b is located approximately 1,400 light-years from Earth in the constellation Cygnus.
• Kepler-452b is about 60% larger in diameter than Earth and has a mass 5 times that of Earth.
• Kepler-452b is also known as "Earth 2.0" due to its similarities to Earth.

### Kepler's Laws

• Kepler's first law states that the orbit of a planet is an ellipse, with the star at one of the two foci.
• Kepler's laws replaced the circular orbits of the heliocentric theory of Nicolaus Copernicus.
• Kepler's second law establishes that a planet's velocity is greater when it is closer to the star and slower when it is farther away.
• Kepler's third law expresses that the square of a planet's orbital period is proportional to the cube of the length of its orbit.
• Kepler's calculations of the orbit of Mars led him to infer that the orbits of other bodies in the Solar System are elliptical.

### Note: Kepler-452b's Habitability

• Kepler-452b is not entirely habitable, as it is a rocky planet with a surface temperature that might be too hot to support liquid water.

Test your knowledge of the exoplanet Kepler-452b with this quiz. Explore its characteristics, its potential as "Earth

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