StarChild: The planet Earth

Read It Listen, Earth: The Water Planet. Seventy percent of the Earth's surface is covered by water. ... Earth is the third closest planet to the Sun. ... http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/earth.html - 7k

Will an asteroid hit the Earth?

How often do we expect the Earth to be hit? ... If we discover an object that will collide with Earth's, what could be done about it? ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question11.html - 8k

When is Earth closest to the Sun?

When is earth closest to the Sun? ... On January 4, 2003, our Earth made its closest approach to the Sun for the year-- an event astronomers call perihelion. ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question53.html - 7k

StarChild: Multidisciplinary Space Activities: Hello... Calling ...

Hello... Calling Earth. NASA has a group of satellites which acts just like a telephone. ... They then send that information to scientists working on Earth. ... http://starchild.gsfc.nasa.gov/docs/StarChild/space_level1/activity/maze.html - 5k

Who figured out the Earth is round?

Question: Who figured out the Earth is round? Answer: It has actually been known that the Earth was round since the time of the ancient Greeks. ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question54.html - 5k

StarChild: Earth's Natural Satellites

Earth's Natural Satellites. Name, Diameter, Distance from Earth. Moon, 3,474 km, 384,400 km. Return to StarChild homepage, Return to the ... http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/earth_satellites.html - 4k

If you are on the Moon, does the Earth move in the sky?

If you are on the Moon, does the Earth move in the sky? ... Generally, the Earth will not "move across the sky"; it pretty much "stays put" in one location. ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question58.html - 6k

StarChild: Facts about the Earth

Facts about the Earth. Average Solar Distance, 152 million km. Revolution Period, 365.26 Earth days. Rotation Period, 23.93 hours. Equatorial diameter, 12,756 km ... http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/earth_facts.html - 4k

StarChild: Multidisciplinary Space Activities: Hello... Calling ...

Hello... Calling Earth. Return to StarChild homepage, Return to the StarChild Main Page, Go to Imagine the Universe! (A site for ages ... http://starchild.gsfc.nasa.gov/docs/StarChild/space_level1/activity/maze_solution.html - 4k

StarChild: Did you know... (Earth)

Did you know...? If the Earth was much closer to the Sun, it would be too hot to support life. If the Earth was much farther away ... http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/earth_know.html - 4k

StarChild: Answer to the Earth Question

And the answer is... The tilt of the Earth on its axis is why we have a change of seasons. Return to StarChild homepage, Return to ... http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/earth_answer.html - 4k

StarChild: The Moon

The Moon: Earth's Satellite. The Moon is the only place in our solar system, other than Earth, where humans have visited. On July ... http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/moon.html - 8k

Where did the Moon come from?

Theory (sometimes called The Ejected Ring Theory): This theory proposes that a planetesimal (or small planet) the size of Mars struck the Earth just after the ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question38.html - 10k

StarChild: Multidisciplinary Solar System Activities: Planet Hop

Below is a chart which lists the gravitational pull (relative to Earth's) of each planet in our solar system. ... Mercury, 0.38, 87.9 days Earth (1/4 of a year), ... http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level2/activity/planet_hop.html - 9k

What is an eclipse?

From Earth, we routinely experience two kinds of eclipses: an eclipse of the Moon and an eclipse of the Sun. Eclipses of the Moon. ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question6.html - 8k

Why does the Sun rise in the east and set in the west?

And that's because Earth spins -- toward the east. ... For the moment, let us just think about one motion - - Earth's spin (or rotation) on its axis. ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question14.html - 7k

What is the <A HREF = "/docs/StarChild/glossary_level1 ...

Answer: There are two periods involved with the orbit of the Moon around the Earth. ... Remember that the Earth moves in its own orbit around the Sun. ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question32.html - 6k

What are the phases of the Moon?

The Moon orbits Earth at an average distance of 382,400 kilometers. ... The phases we see result from the angle the Moon makes with the Sun as viewed from Earth. ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question3.html - 8k

StarChild: Space Stations

The Skylab crews spent a total of 171 days, 15 hours, and 14 minutes orbiting the Earth. They circled Earth 2,476 times. The Skylab ... http://starchild.gsfc.nasa.gov/docs/StarChild/space_level1/space_station.html - 8k

What causes a "falling star"?

streaks of light you can sometimes see in the night sky are caused by tiny bits of dust and rock called meteoroids falling into the Earth's atmosphere and ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question12.html - 8k

Why is the crescent moon sometimes lit on the bottom?

It is all a result of the Moon's orbit around the Earth, and the Earth's orbit around the Sun. ... This is why we have seasons here on Earth. ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question43.html - 8k

StarChild: The planet Venus

Read It Listen, Venus: Earth's Twin. ... It is called this because it looks so bright to us from Earth. Venus and Earth are almost the same size. ... http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/venus.html - 7k

StarChild: Multidisciplinary Solar System Activities: A Song for ...

Italian composer and violinist, Antonio Vivaldi, used the Earth's seasonal relationship to the Sun as inspiration for his masterpiece "The Four Seasons". ... http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level2/activity/song.html - 9k

Understanding Angular Size

This person will represent what someone on Earth would see. Have ... size. Why do you think they look the same size to the Earth observer? ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/understand_size.html - 5k

Can you tell me about the other solar systems being discovered?

Located in the Milky Way about1,500 light-years from Earth, the nebula formed from collapsing gas clouds, yielding many new stars. ... http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question10.html - 11k