![]() ![]() Knowing how much frost is in these craters and where to find it can help us prepare for extended missions on the Moon, when water will be a valuable resource. ![]() NASA’s Lunar Flashlight mission will observe and map the location of frost within permanently shadowed craters in the Moon’s south polar region. Learn more about the October 2023 eclipse.Will the eclipse be an annular eclipse or a total eclipse? What percentage of the Sun’s disk area will be obscured by the Moon? The Moon, with a radius of 1,737 km, will be 388,901 km from Earth. The Sun, with a radius of 695,700 km, will be 148,523,036 km from Earth. 14, 2023, a solar eclipse will be visible across North and South America. When the Moon is farther from Earth during an eclipse, it leaves a glowing ring of sunlight shining around the Moon, resulting in an annular eclipse. During a total eclipse, the distances are such that the Moon covers all of the Sun's disk area. Because Earth’s orbit around the Sun and the Moon’s orbit around Earth are not perfect circles, the distances between them change throughout their orbits. Use the formula for volume, V = 4/3 πabc, where a, b, and c are the lengths of the semi-axes, to compute Psyche's approximate density.īased on the average density of terrestrial materials (listed below), does Psyche's density support the observations indicating the presence of metal?Ī solar eclipse occurs when the Moon passes between Earth and the Sun, fully or partially blocking the Sun's light from our perspective. Its mass, as estimated from its gravitational effects on nearby bodies such as Mars, is about 2.7 x 10 19 kg. Psyche has a roughly triaxial ellipsoid shape with axes of about 290 km, 245 km, and 170 km. Determining how much metal exists on the asteroid is one of the goals of NASA’s Psyche mission, which will use specialized tools to study the asteroid's composition from orbit. If Psyche consists of a large amount of metal, it might resemble a planetary core from which we could learn about terrestrial planet core formation. Earth and other terrestrial planets have metal cores, but they are buried deep inside the planets, so they are difficult to study. ![]() Download this graphic as a background for your phone or desktopĪsteroid (16) Psyche is of particular interest to scientists because ground-based observations indicate that the surface may be metallic.View illustrated answer key (also available as a text-only doc).How much bigger is the area of Webb’s primary mirror than Hubble’s? Launched in 1990, the Hubble Space Telescope changed our understanding of the universe when it began operations using a primary mirror that had a diameter of just 2.4 meters. This science instrument can reveal stars hidden within gas and dust clouds and tell scientists about the materials that make up distant galaxies. This large mirror allows the telescope to collect incredibly faint infrared light and reflect it onto four onboard science instruments, like the Mid-Infrared Instrument, or MIRI. Webb uses 18 hexagonal mirrors that combine to form a massive primary mirror with a surface area of 26.4 m 2. To capture light from these distant and faint objects, the telescope must be very sensitive. The James Webb Space Telescope was designed to look back at some of the earliest galaxies in the universe. ![]()
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