Write an article on any topic related to science.
But it should be interesting.
Kinda no spam,
no copy paste ^^"
Answers
Space exploration is much too expensive and the money should be spent on more important things. ... In many countries, a big proportion of expenditure is being spent on exploring the space. It is argued that this expenditure should be spent on other important things rather than on space exploration.
Space Mining Could Save the World
As we develop new technologies on Earth, the strain on our natural resources continues to increase.
The extraction of valuable minerals has led to a host of problems, including environmental damage and human exploitation, but there's a wealth of precious materials in space.
Overcoming the challenges of working in space has led to many technological and scientific advances that have provided benefits to society on Earth in areas including health and medicine, transportation, public safety, consumer goods, energy and environment, information technology, and industrial productivity.
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Answer:
Space Research - Jupiter Formation - Wanna Play
Explanation:
Although planets surround stars in the galaxy, how they form remains a subject of debate. Despite the wealth of worlds in our own solar system, scientists still aren't certain how planets are built. Currently, two theories are duking it out for the role of champion.
While the first, core accretion, works well with the formation of terrestrial planes, scientists have difficulty reconciling it with giant planets like Jupiter. A more recent model known as disk instability may help solve some of the problems that core accretion fails to address.
Weighing in at 2.5 times the mass of the rest of the solar system planets, Jupiter played an important role in the formation and evolution of its siblings. New theories about the early solar system suggest that Jupiter may have moved around, stirring up material. The complex dance of the king of planets may have directly influenced the formation of Mars and played a role in the bombardment of the rocky planets.
Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula.
With the rise of the sun, the remaining material began to clump up. Small particles drew together, bound by the force of gravity, into larger particles. The solar wind swept away lighter elements, such as hydrogen and helium, from the closer regions, leaving only heavy, rocky materials to create smaller terrestrial worlds. But farther away, the solar winds had less impact on lighter elements, allowing them to coalesce into gas giants. In this way, asteroids, comets, planets, and moons were created.
The core accretion model suggests that the rocky cores of planets formed first, then gathered lighter elements around it to form its crust and mantle. For rocky worlds, the lighter elements build up their atmosphere.
Exoplanet observations seem to confirm core accretion as the dominant formation process. Stars with more "metals" — a term astronomers use for elements other than hydrogen and helium — in their cores have more giant planets than their metal-poor cousins. According to NASA, core accretion suggests that small, rocky worlds should be more common than the more massive gas giants.
The 2005 discovery of a giant planet with a massive core orbiting the sun-like star HD 149026 is an example of an exoplanet that helped strengthen the case for core accretion.
"This is a confirmation of the core accretion theory for planet formation and evidence that planets of this kind should exist in abundance," said Greg Henry in a press release. Henry, an astronomer at Tennessee State University, Nashville, detected the dimming of the star.
In 2017, the European Space Agency plans to launch the CHaracterising ExOPlanet Satellite (CHEOPS), which will study exoplanets ranging in sizes from super-Earths to Neptune. Studying these distant worlds may help determine how planets in the solar system formed.
"In the core accretion scenario, the core of a planet must reach a critical mass before it is able to accrete gas in a runaway fashion," said the CHEOPS team.
"This critical mass depends upon many physical variables, among the most important of which is the rate of planetesimals accretion."
By studying how growing planets accrete material, CHEOPS will provide insight into how worlds grow.
The disk instability model
For massive gas giants like Jupiter, however, core accretion takes far too long. The cloud of material around the sun only lasts a short time it is either gathered up by planets or evaporates completely.
"Giant planets form really fast, in a few million years," Kevin Walsh, a researcher at the Southwest Research Institute in Boulder, Colorado, told Space.com. "That creates a time limit because the gas disk around the sun only lasts 4 to 5 million years."
While rocky planets have plenty of time to build up their heavier atmospheres, or collect them from material crashing into the planet, the atmospheres of gas giants are too light and disappear too quickly. For instance, Jupiter is composed almost completely of hydrogen, with about 10 percent of its volume made up of helium. Small traces of other elements exist in Jupiter's atmosphere, as well, but most of its mass is held by these two basic elements. Scientists had to look for a new way to build the larger planets.
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