CK12 Earth Science

telescopes used a combination of two lenses to make distant objects appear both nearer and larger. The termtelescopewas coined b ...

Figure 23.5: The telescope still looks much the same today. ( 22 ) ...

Newton’s telescope used curved mirrors instead of lenses to focus light. Telescopes that use mirrors are calledreflecting telesc ...

Figure 23.7: The South African Large Telescope (SALT) is one of the largest reflecting telescopes on Earth. SALT’s primary mirro ...

Figure 23.8: Many amateur astronomers today use catadioptric telescopes. These telescopes have large mirrors to collect a lot of ...

Figure 23.9: The radio telescope at the Arecibo Observatory in Puerto Rico has a diameter of 305 m. ( 1 ) Figure 23.10: The Very ...

Space Telescopes Telescopes on Earth all have one significant limitation: the electromagnetic radiation they gather must pass th ...

spectrum. Of these, all but the Compton are still in orbit and active. NASA is planning for another telescope, the James Webb Sp ...

stars. They called these bright spots in the skyplanets, which in Greek means “wanderers.” Today we know that the planets are no ...

sial new model of the universe. According to Copernicus’s model, Earth and the other planets revolve around the Sun. In Galileo’ ...

Figure 23.14: This is an ultraviolet image of the red supergiant star Betelgeuse taken with the Hubble Space Telescope in 1996. ...

Lesson Summary Astronomers study light from distant objects. Light travels at 300,000,000 meters per second—faster than anythin ...

http://www.astronomics.com/main/category.asp/catalogname/Astronomics/category name/V1X41SU50GJB8NX88JQB360067/Page/1 http://gal ...

refracting telescope Telescopes that use convex lenses to collect and focus light. space telescope Telescopes in orbit above Ear ...

warned his son not to fly too close to the sun, but Icarus, thrilled with the feel of flying, drifted higher and higher. When he ...

Figure 23.16: When the skater pushes against the wall, the wall exerts an equal force on the skater in the opposite direction. ( ...

rush out the end, the rocket moves in the opposite direction, as predicted by Newton’s Third Law of Motion. The reaction force o ...

The first person to establish many of the main ideas of modern rocketry was a Russian schoolteacher, named Konstantin Tsiolkovsk ...

and France. In 1942, the V-2 was launched to an altitude of 176 km (109 miles), making it the first human-made object to travel ...

is launched at a slow speed, it will fall back to Earth, as in paths A and B in the figure. However, if it is launched at a fast ...