What does this photograph which is representative of most of Mercury indicate about the planet quizlet?
What does this photograph, which is representative of most of Mercury, indicate about the planet? The surface of this planet is obscured by an atmosphere of thick clouds and toxic gases.
What evidence shows that Venus has been resurfaced within the past billion years?
What evidence shows that Venus has been resurfaced within the last billion years? There are a relatively small number of craters on the surface, and the craters appear to be randomly distributed. This implies that the entire surface has the same relatively young apparent age.
What does this photograph indicate about the ages between the light colored area on the right versus the dark colored area on the left quizlet?
What does this photograph indicate about the ages between the light-colored area on the right versus the dark-colored area on the left? The area on the right is older because it contains more craters than the area on the left.
What is the dominant geologic process in our solar system?
Impact cratering is the dominant geologic process in the solar system. It has affected all terrestrial planetary surfaces, producing battered surfaces on Mercury, the Moon, and in the southern highlands of Mars.
What evidence exists for active volcanoes on Venus?
What evidence exists for active volcanoes on Venus? The presence of CO2 in the atmosphere on the surface of venus gives evidence that volcanoes are currently active and the presence of SO2 and sulfuric acid clouds.
What is the current theory for the formation of our solar system?
Contemporary view. The most widely accepted hypothesis of planetary formation is known as the nebular hypothesis. This hypothesis posits that, 4.6 billion years ago, the Solar System was formed by the gravitational collapse of a giant molecular cloud spanning several light-years.
What evidence can you cite that Venus once had more water than at present where did it go?
Where did Venus' water go? It was broken up by ultraviolet radiation from the Sun. What evidence can you cite that Mars once had more water than it does now? Where did Mars' water come from?
What evidence points to a watery past for Venus?
In 1978, NASA's Pioneer Venus spacecraft found evidence that the planet may have once had shallow oceans on its surface. Since then, several missions have investigated the planet's surface and atmosphere, revealing new details on how it transitioned from an "Earth-like" planet to the hot, hellish place it is today.
What is the probable origin of the features shown in this image of the surface of Mars?
What is the probable origin of the features shown in this image of the surface of Mars? Sublimation of ground ice caused collapse of the surface. How did these vast valleys on Mars form? The outflow valleys were eroded by liquid water.
Which of the following methods of exploration has as of 2015 not yet been utilized for exploring distant planets?
Which of the following methods of exploration has, as of 2015, not been utilized for exploring distant planets? Sending humans in spacecraft. Match the moon of Saturn with its correct description. The atmosphere of ____ is less dense than Earth's, but its winds are very strong.
What physical processes are most important in shaping the surfaces of Venus and Earth?
Weathering and eolian transportation are, however, important geologic processes. Radar imagery of Venus shows broad smooth lowlands, volcanic rises (or domes) called uplands, and continent-sized areas of strongly deformed highlands.
How do we know that there are volcanoes on Venus surface?
In 2010, the European Space Agency (ESA)'s Venus Express spacecraft detected infrared anomalies on the top and eastern flanks of Idunn Mons that suggested the presence of fresh volcanic deposits. This provided the first hint that the area might have seen active volcanism in the past few million years.
What is on Venus surface?
Surface temperatures on Venus are about 900 degrees Fahrenheit (475 degrees Celsius) – hot enough to melt lead. The surface is a rusty color and it's peppered with intensely crunched mountains and thousands of large volcanoes. Scientists think it's possible some volcanoes are still active.
Which of the following methods have astronomers used to detect extrasolar planets?
While the Doppler technique is most widely used for detecting extrasolar planets, it is best suited to look for very massive planets orbiting close to their parent star. This is because the parent star will wiggle more with a large planet nearby, thereby creating a larger and more easily detectable spectral shift.
What is the name of the theory that states our solar system formed through the gravitational contraction of a gas cloud?
The nebular theory holds that our Solar System formed out of a nebula which collapsed under its own gravity. – We observe stars in the process of forming today. – The are always found within interstellar clouds of gas.
What evidence can you give that Venus once had significant amounts of water?
If Venus once had significant amounts of water, where did that water come from? Where did it go? Water vapor was outgassed from the planet's interior during differentiation. Then it was destroyed by ultraviolet radiation from the Sun, and hydrogen leaked away into space.
What evidence do we have that the Martian atmosphere was denser in the past than it is today?
What evidence do we have that the Martian atmosphere was denser in the past than it is today? The abundance of argon by mass is 1.6% and we have observed dry stream beds and outflow channels. Evidence suggests that Mars had a greater abundance of atmospheric carbon dioxide in the past than it has today.
What has been discovered on the surface of Venus How many of them have been found?
It found volcanoes, long lava channels, pancake-shaped domes, and evidence of hot mantle plumes at depth (like the one responsible for creating the Hawaiian islands). More recently, ESA's Venus Express orbited from 2006 to 2014.
Does Venus have a solid surface?
The surface of Venus Rocky ground lies beneath the layers of clouds. But unlike Mars and Mercury, which are both scarred by craters, Venus has a relatively smooth surface. Early in the history of the solar system, while planets such as Venus were forming, the cloud of dust and rock orbiting the sun was a chaotic place.
How can planetary geologists learn about the geological ages of solid surfaces planets or satellites in the solar system?
The ages of the surfaces of objects in the solar system can be estimated by counting craters: on a given world, a more heavily cratered region will generally be older than one that is less cratered.
What are the main features of Venus?
Venus has a thick, toxic atmosphere filled with carbon dioxide and it's perpetually shrouded in thick, yellowish clouds of sulfuric acid that trap heat, causing a runaway greenhouse effect. It's the hottest planet in our solar system, even though Mercury is closer to the Sun.
What evidence do scientists have that volcanic activity completely changes the surface of Venus?
What evidence do scientists have that volcanic activity completely changes the surface of Venus? Craters on Venus are about the same age, and they are relatively young. Thus, the surface must be "replaced" from time to time. What would have happened if Earth's oceans did not absorb carbon dioxide in the atmosphere?
How was Venus discovered?
Venus was the first planet to be explored by a spacecraft – NASA's Mariner 2 successfully flew by and scanned the cloud-covered world on Dec. 14, 1962. Since then, numerous spacecraft from the U.S. and other space agencies have explored Venus, including NASA's Magellan, which mapped the planet's surface with radar.
How do scientists study Venus?
Earth-based radio telescopes also study Venus, including the Goldstone Solar System Radar in California, Arecibo Observatory in Puerto Rico, and Green Bank Observatory in West Virginia. Of course, you don't need a spacecraft or a telescope to observe Venus.
How have we observed surface features on Venus?
The planet is a little smaller than Earth, and is similar to Earth inside. We can't see the surface of Venus from Earth, because it is covered with thick clouds. However, space missions to Venus have shown us that its surface is covered with craters, volcanoes, mountains, and big lava plains.
What is evidence of volcanic activity on Venus?
Volcanism on Venus has taken place within the last 2.5 million years; however, there is no absolute proof that any volcano on Venus has erupted recently. Recent radar imagery shows more than 1,000 volcanic structures and evidence of possible periodic resurfacing of the planet by floods of lava.
Which of the following is evidence for volcanic activity on Venus?
What evidence exists for active volcanoes on Venus? The presence of CO2 in the atmosphere on the surface of venus gives evidence that volcanoes are currently active and the presence of SO2 and sulfuric acid clouds.
How do scientists know what the surface of Venus looks like?
Scientists on Earth used computers to analyze that data and create maps to help visualize Venus' surface. NASA's Magellan spacecraft is another example of a successful orbital mission that mapped Venus from above. This spacecraft used radar to map much of the planet's surface before ending its mission in 1994.
What is the Doppler technique?
(click to enlarge) The Doppler technique is a good method for discovering exoplanets. It uses the Doppler effect to analyze the motion and properties of the star and planet. Both the planet and the star are orbiting a common center of mass.
What techniques are used to search for exoplanets?
The main techniques used to detect exoplanets are:
- Direct imaging: The exoplanet is imaged directly using large telescopes fitted with adaptive optics and coronagraphs. …
- Radial velocity: …
- Transits: …
- Microlensing: …
- Transit timing variations: