Space HW - Edubirdie

University:
University of North Texas
Course:
BIOL 1700 | Biology
Academic year:

2023
Views:

0

Pages:

2
Author:

Memer Godboi

#2 What is a Planet? Name Teacher Class Date Directions: Use the information in the text and illustration to respond to the student questions on page 2 Do you know what a planet is? To be a planet, an object must orbit a star If it orbits something else, like another planet, it is a moon instead. The second point is that the object must be ble enough that gravity makes it into a sphere. Many asteroids and comets have odd shapes. They are definitely not planets. A group of astronomers called the International Astronomical Union is working on an official definition for planets. Until they decide, different people will have different definitions What do you think the definition of "planet" should be? Recently, NASA announced the discovery of Kepler-22h, a planet the discovered in the habitable zone, an area with a distance from a star where temperatures will permit the existence of liquid water This diagram compares our own solar system a to Kepler-22, 1 star system containing the first habitable zone planet discovered by NASA's Kepler mission, The habitable zone is the sweet spot around a star where temperatures are right for water to exist in its liqund form. Liquid water is essential for life on Earth Kepler-22's star is a bit smaller than our sun, so its habitable zone is sitghtly closer in. The diagram shows an artist's rendering of the planet comfortably orbiting within the habitable zone, similar to where Earth coincles the sun. Kepler-22b has a yearly orbit of 289 days. The planet is the smallest known to orbit in the middle of the habitable zone of a sun- like star. It's about 2.4 times the size of Earth. http.//www.nasa.gov/mission pages/kepler/news/kepscicon-briefing.html Kepler-22b has several Earth-like characteristics The new planet's temperature is around 72 degrees Fahrenheit and its radius es 2.4 times Earth's. The planet completely orbits its star, which USATREP USATastores, Inc. All Rights Reserved is aimilar to our sun, every 290 days, just 75 days shy of an Earth year Still, NASA is not yet clear if Kepler-22b is composed of rock, gas or liquid, Student Questions 1 What is the two requisites for a "planet"? 2. What is the habitable zone of a planet? 3 Compare Kepler-22 with the Earth 4. True or False All planets are solid 5. According to astronomers, the new definition of a planet: a planet is an object that orbits the sun and is large e enough enough to to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit, Because of this definition, what recently happened in the world of fastronomy and our solar system? (Hint: Revisit paragraph #2) *Bonus: 6. Why is Pluto not considered to be a planet? USATREP

Description

Related Documents

Free up your schedule!

Take 5 seconds to unlock