Jhaque

The ocean tides of the earth are? attracted to the moon by its gravitational pull - Highest when the moon is full or new Red stars are _____ than blue stars cooler Red stars are supergiant’s Blue stars are hotter than red stars Modern telescopes use mirrors made of glass because glass can be "zero expansion" and doesn't change shape the size of mountains on earth is limited by? Gravity Earth is not a perfect sphere because? its rotation what ...

The light from the dust tail... is reflected sunlight from the dust. The source material for a meteor shower is usually... the debris left behind by a comet. The name of a meteor shower comes from... the constellation closest to the radiant. The asteroid that led to the extinction of the dinosaurs was believed to have 6.8×10^15 kg of mass and a speed of 12 km/s. What is the impact energy associated with the collision with Earth? 4.9x10^23 J The dwarf planet Ceres has a ...

From lecture, how often does the Moon rotate on its axis? The moon completes a revolution every 27.3 days, which is the time it takes for the moon to go through all of its phases. -From lecture, draw and label the Earth, Sun and Moon, indicate the direction of the Moon's orbit, and label New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full, Waning Gibbous, Third Quarter, Waning Crescent. From lecture, explain the difference between the sidereal and solar month. Which one is lo...

Which of the following studies is best suited to astronomical observations that fall into the category called time monitoring? -Studying how a star's brightness varies over a period of 3 years. -Measuring the rotation rate of a distant star. -Studying how different planets differ in their surface compositions. -Determining the age of the solar system. Which of the following is not a reason why telescopes tend to be built on mountaintops that are relatively far from cities and are in r...

Each of the following diagrams shows a spaceship somewhere along the way between Earth and the Moon (not to scale); the midpoint of the distance is marked to make it easier to see how the locations compare. Rank the five positions of the spaceship from left to right based on the strength of the gravitational force that Earth exerts on the spaceship, from strongest to weakest. (Assume the spaceship has the same mass throughout the trip; that is, it is not burning any fuel.) Gravity follows an in...

T/F The most abundant element in the Sun is hydrogen. True T/F Neutrinos have never been detected experimentally. False T/F The proton-proton chain releases energy because mass is created in the process. False T/F There are as many absorption lines in the solar spectrum as there are elements present in the Sun. False T/F The density and temperature in the solar corona are much higher than in the photosphere. False The Sun spins on its axis roughly once each a)...

The Sun has an angular diameter of about 0.5◦ and an average distance of about 150 million km. What is the Sun's approximate physical diameter? Compare your answer to the actual value of 1 390 000 km. Given that the Sun has an angular diameter of about 0.5◦ and an average distance of about 150 million kilometers, we can use the angular diameter equation from Mathematical Insight 2.1: θ = d × 360◦ 2πD ,where θ is the angular diameter, d is the physical diameter, and D is the phy...

Asteroid belt between mars and jupiter Meteors shooting stars tiny dust particles or grains less than a centimeter in size occur when asteroid crosses earths orbit Meteorite a piece of meteor that survives atmospheric entry Jupiter less dense but 300x the size of earth small ring system Great red spot giant storm larger than earth that has lasted for 300 years Jupiter's moons more 50 moons Io, europa, ganymede, callisto Terrestrial planets Mercury, Ve...

Local Group The group of about 40 galaxies to which the Milky Way Galaxy belongs. Galaxy Clusters A collection of a few dozen or more galaxies bound together by gravity; smaller collections of galaxies are simply called groups. Superclusters The largest known structures in the universe, consisting of many clusters of galaxies, groups of galaxies, and individual galaxies. Observable Universe The portion of the entire universe that can be seen from Earth, at least in principle. ...

Two Laws of Thermal Radiation 1) (Stefan-Boltzmann law) Each square meter of a hotter object's surface emits more light at all wavelengths 2) (Wien's Law) Hotter objects emit photos with higher average energy. Magnification the ratio of an object's image size to its real size; can blur images if too high or too low Resolution of a telescope amount of detail a telescope allows us to see; the smallest angle over which we can tell that two dots (or two stars) are distinct ...