Comets Essay

Equatorial diameter is 49,528 km.The Polar diameter is 48,682 km. You may look into the sky and think that you can see all the stars and planets. Many planets are not visible to the naked eye, and some planets are not visible at certain times of the year. In this report, you will learn all of this information about Neptune.

Stars are the most recognized astronomical object in space and they represent the building blocks of galaxies. Stars distribute elements such as: carbon, nitrogen, and oxygen. A star develops from a cloud of hydrogen and helium, the dust clouds that are scattered throughout galaxies. An example of a dust cloud is the Orion Nebula. The gas and dust begin to collapse from its own gravitational pull. As the cloud collapses, the middle gets hotter. This is known as a prostar. A dense and hot core forms which begins to collect dust and gas. All this material may not end up as a part of the star but can become planets, asteroids, comets, or remain dust. A star about the size of our sun can up to 50 million years to mature. The smallest stars are

Hygroscopic nuclei is derived from the cloud condensation nuclei process. It is very significant in cloud formation because it can pull together different types of water molecules in the atmosphere due to a

2. An interstellar cloud of gas known as an H-II region is mainly composed of what?

craters. The smaller moons of Saturn, are mostly rock and ice, and are heavily cratered.

Hale Bopp can be described as having a large core consisted of dirt and ice. This being said, the average diameter of a normal comet is one to two miles while Hale Bopp is between twenty to twenty-five miles in diameter. It is recorded to be about the same age as the sun. Hale Bopp is located in the Oort Cloud solar system.

A molecular cloud is a giant condensation of dust and molecular gas. They are regions of relatively dense interstellar gas and dust with hydrogen molecules as well as carbon and silicate materials forming the primary constituents. Helium and small amounts of heavier elements are also found within the cloud. Molecular clouds are very cold and dark regions with typical temperatures of between 10 and 50 Kelvin. The mass of a typical

Before all else, most people may not know how the frozen flakes are formed. According to, Snow Day! By Tabitha Walker, the process flakes of how the icy flakes are formed all starts when water evaporates from the Earth and rises into the atmosphere. As the water reaches a certain level of the atmosphere that is 32° Fahrenheit, it freezes. These tiny droplets of frozen water are called ice crystals. These ice crystals then form around a dust or dirt particles. Some of the larger snowflakes can have up to 200 ice crystals. These few steps are what form the beautiful snowflakes that fall from the sky on a harsh winter day.

The first planet after the Sun, Mercury, has very similar geological features with the Earth's moon. Its surface is covered with varying sizes of craters which was used by scientists to determine the planet's age. It is said that these craters are the "scars" from asteroid and comets during the Late Heavy Bombardment Period. Measuring 1550km, the Caloris Basin is the largest crater in Mercury's surface and 14 other large crater basins were found. Although it has been identified that Mercury's surface is geologically inactive, large deposits of water ice can be found near its poles. These bodies of water ice were found on deep craters around Mercury's poles and are always in the shadows. If one side of the planet is covered with craters, another

Levy 9. “Comets are like cats. They both have tails and do precisley whatt they want”

Broz, M. et al.:2005, Asteroids, Comets, Meteors Proceedings IAU Symposium No. 229, 2005 D. Lazzaro, S. Ferraz-Mello & J.A. Fern´andez, eds.

The Cassini spacecraft is about to get an icy shower as it orbits Saturn. Cassini will storm through a jet of water vapor and frozen particles erupting from the south pole of Enceladus. The spacecraft will zoom within 30 miles of the pole, providing the best sampling yet of its underground ocean.

It started five billion years ago as a cloud of dust and gas about 10 billion kilometers in diameter that rotated slowly in space. This massive cloud shrank over time because of its own gravitational pull, or because of an exploding passing star. Most material collected in the center and it rotated faster as it shrank. Compression of the material made it hotter, which started hydrogen fusion, forming the sun. Ten percent of the material in the cloud formed a disk around the sun. Due to friction in the disk, most of the mass collected into whirlpools. These whirlpools shrank to form protoplanets. These protoplanets became planets and moons. Excess material became comets, asteroids, and meteoroids. A problem with this hypothesis is that it would be unlikely for a passing star to explode, because stars are very far apart from each other. Also, as with the nebular hypothesis, it would take an unreasonable amount of gravitational pull for the disk to condense into

Neptune has some very distinct features. Some of the features are similar to Earth, but some are not even in the same realm as Earth. The Hubble Telescope recently discovered Neptune. It has found that there are dark vortices on Neptune. Vortices are similar to cyclones. There are bright companion clouds which form when air swirls up from the ground, causing gases to freeze into methane crystals. Neptune’s surface is not solid. Some astronomers believe that the core is rocky and the interior has a high density and slushy. The interior levels, the astronomers say, have thick layers of water clouds. Earth, on the other hand, has three parts that make up the surface. The first is the core. The outer core is liquid, and the inner core is solid.

The solar wind containing these hot gases races toward the edges of the solar system, and smash in to the magnetosphere. The magnetosphere protects the earth by deflecting most of the solar wind around the planet. Trillions of these charged particles mange to get through and project from the North and South poles. Energy released in this fashion excites atoms of nitrogen and oxygen, which in turn emit pulses of colored light. These formations are called an aurora. The aurora borealis, which are visible in Alaska, are a result of this sort of space storm.