ANSWER IF YOU KNOW PLZ 1. What best describes a planet in the "habitable zone"?

Earth

Venus

Mercury

Jupiter

2. Choose the best description of the transit method of locating exoplanets.

When a planet passes between a star and an observer the luminosity of the star is reduced by a small amount.

Using satellite based telescopes in different locations astronomers are able use parallax calculations to determine if there are planets in orbit around a star.

Using a telescope, wobble can be detected from the effect that the planet's gravity has on the star.

By aiming powerful telescopes directly at star systems astronomers are able to detect larger planets.

3. Choose the best description of the radial velocity method of locating exoplanets.

The orbiting planet causes the star to wobble causing it to appear bluer or more red depending on which direction it moves.

Planets are timed as they orbit distant stars. The size of the planet can be judged by time duration it takes to transit a star.

This method is works well for detecting planets orbiting in close proximity to a star, so the planet can more readily observed passing in front of the star.

4.Choose the statement that is NOT true.

More than 50% of the 100 billion stars in the Milky Way galaxy have at least one planet orbiting.

Hundreds of stars with planets have been confirmed using the radial velocity method and the transit method.

The first Earth-size planets ever found outside the solar system were discovered in 2012 by the Kepler Mission team.

Planets orbiting stars in the "habitable zone" are likely to have life existing on them.