What are the streaks on the moon?
Lunar crater rays are those obvious bright streaks of material that we can see extending radially away from many impact craters. Historically, they were once regarded as salt deposits from evaporated water (early 1900s) and volcanic ash or dust streaks (late 1940s).
What is a sea on the moon?
Despite their name, the lunar seas are plains of solidified lava which appear dark on the Moon’s disc. Many lunar seas are large enough to spot with just your eyes, so see how many you can locate for our first challenge sheet.
What can the lines around craters on the Moon tell us?
The rays are very useful to lunar geologists as they can tell us about the relative age of the crater compared with other craters and geological features, since if they overlie another ray system, they must be younger than that other system.
What is the bright light on the moon?
The bright light is not a star – although it is sometimes called the Evening Star – but rather the planet Venus. After the Sun and the Moon, Venus is the third brightest object in our skies.
What is the biggest crater on Earth?
The Yilan Crater is the largest meteorite impact crater on Earth in 100,000 years, reported Xinhua News Agency.
Who found water on moon?
Like Cassini, SARA found water/hydroxyl groups in the lunar soil. The discovery proved timely for ESA’s BepiColombo mission to study Mercury, which carries two similar instruments for detecting water. Chandrayaan 1’s M3 instrument detected water and hydroxyl molecules almost everywhere on the Moon too.
Why do they call it the Sea of Tranquility?
The Sea of Tranquility is not actually a sea, so Neil Armstrong didn’t have to walk on water. In fact, there isn’t a single sea on the lunar surface. The Sea of Tranquility is actually a lunar mare. … Lunar maria were named as such because early astronomers mistook these areas as seas.
How many Mare are on the Moon?
There are about 20 major areas of this type, most of them—including the largest ones—located on the side of the Moon that always faces Earth. Maria are the largest topographic features on the Moon and can be seen from Earth with the unaided eye.
What are the lines at the top and bottom of the Moon represent?
The top and bottom points represent the first- and third-quarter positions, when the Moon is one-quarter or three-quarters (respectively) of the way through its cycle of phases.
What do craters tell us?
Impact craters allow scientists to study a planet’s geological history—even when the records are buried beneath the surface. … Rocks ejected by impacts contain minerals that formed in the presence of liquid water