There are 6,000 stars that can be observed from Earth. Sun is the nearest star from the Earth. Stars appear in the sky at night.Our distributions reproduce the observed extinction of starlight, which varies depending on the interstellar environment through which the light travels. (Weingartner & Draine, 2001). Stars do not appear during the daylight because of Sun.
2.0 Literature Review (related topics) 2.1 The sun Sun is a giant hot object at the heart of the solar system which scientists believes that it was formed ago 4.6 billion years due to the collapse of the solar nebula. The sun is huge with a volume of 1.3 million times larger than the earth. The internal structure of the sun is composed of several zones such as core, radiative zone and the convection zone from inside out of the sun. The energy of the sun is produced only at the high tempered and pressured core, which exist one quarter of suns radius. The energy is created through nuclear fusion of hydrogen in high pressure and a temperature of 15 million kelvins.
“The total mass of all eight planets is around 2.67 x 1027 kg. The sun 's mass is 1.989×1030 kilograms (2.2×1026 short tons), approximately 330,000 times the mass of Earth. It accounts for about 99.86% of the total mass of the Solar System.” (space.com). In this situation, the sun has a lot greater mass than all the planets, so it can carry the planets’ force, so it doesn’t move. This shows that the magnitude of the planets in the orbit around the
At the beginning, these clouds are at a very low temperature (about 10 to 20 K) with a mass of 2.1013 kg (equals to 1000 solar masses). The deep cold makes these gases (mostly CO and H2) combine and become denser. Due to the gravity, these gases would form a rotating disk, in which its center contracts gradually while the internal pressure pushes outward to balance it. But when the density in the center reaches a certain point called Jean’s mass MJ, a collapse would occur and form the protostar - the beginning of a star's life.
Space and time were created in the Big Bang, and these were imbued with a fixed amount of energy and matter; as space expands, the density of that matter and energy decreased. The Big Bang theory was proven by astronomical observations by Edwin Hubble and later confirmed in 1964 by the discovery of the cosmic background radiation by the Nobel Prize winners Arno Allan Penzias (b. 1933) and Robert Woodrow (b. 1936), which radiation was predicted by the Big Bang theory. According to the current measurements, the universe came into being about 13.75 billion years ago.
The Voyager 1 is the groundbreaking spacecraft this is the first and only to be sent into interstellar space. While this is exciting for space enthusiasts, it could be the only of its kind. In 2008, Joint Propulsion Conference concluded travel outside our solar system is not feasible. The closest star to our solar system, Proxima Centauri, is 4.37 light years away. To travel this amount of space within a human lifetime would take a drastic leap in the quality of our technology.
Alkaline Earth Metals IS made up of six elements. It’s the second group on the periodic table. All alkaline earth metals have an oxidation number of +2, making them very reactive. Because of their reactivity, the alkaline metals are not found in nature.All of the Alkaline earth metals except magnesium and strontium have at least one naturally occurring radioisotope Noble Gases is made up of six elements on the periodic table which are in the last group on the periodic table. There are actually now seven elements in the noble gases.
The rocket travels at close to light speed and returns to Earth a year later. Upon arrival back on Earth, the baby on the rocket ship would be one year old while his or her twin would be nearly 100 years old. Although this sounds like science fiction, records from atomic clocks placed on moving aircraft compared to identical instruments left on the ground demonstrate that time dilation is indeed
The ocean's area is about 14.056 million km2, which is the smallest of the world's 5 oceans, and it has 45,389 kilometres (28,203 miles) of coastline. The central surface covered by ice about 3 metres (9.8 feet) thick. The biology there is quite special. Endangered species there include walruses, whales and polar bears. Year by year the Arctic ocean is becoming less icy, as a result of global warming.
According to Garba and Bashir (2002), the country is also experiencing some cold and dusty atmosphere during the harmattan, in its Northern part, for a period of about four months (November-February) annually. The dust has an attenuating effect on the land area of 924x103Km2 for the country and an average of 5.535KWh/m2/day, Nigeria has an average of 1.804 x 1015KWh of incident solar energy annually. This annual solar energy insolation value is about 27 times the nation total conventional energy resources in energy units and is over 117, 0000 times the amount of electric power generated in the country. In other words, about 3.7% only of the national land area is needed to be utilized in order to obtain annual collection from the sun an amount of energy equal