Others recognized patterns in the ways the objects moved. Thus, astronomy was born. Around 600 B.C. it was accepted that the Earth was not a flat object through the insight of Greek philosophers from looking at the round shadow that the Earth cast on the Moon during lunar eclipses and how the stars seemed to move as one approaches the North Pole. (Larsen, 37). Eudoxus was philosopher known for the idea of a geocentric
Differences: Due to its core, Earth has extreme magnetic field. Mars field is not too magnetic. Mars’s atmosphere has less density, similar to 1% of Earths atmosphere. Earth has more density than Mars.
William Burrows an American scientist, author, and journalist certifies that “ Since they [astronomers] do not doubt that several [asteroids] are headed in our direction, advanced knowledge could make it possible to destroy or deflect an approaching asteroid or comet.” (Burrows, 2003). With an objective of avoiding an impending doom, the NEO (Near Earth Objects) program coordinates NASA-sponsored efforts with the astronomical community in their goal of detecting and tracking these asteroids, in which some have been identified as PHA’s (Potentially hazardous Asteroids). Let us not forget that in 1908, an asteroid was reported to have
The article talked about these things in weird and wonderful ways through the pretence of a winter wonderworld. In conducting more research on the topic of ice on other planets and moons I found an interesting website that discusses the idea of ice volcanoes. The web page “Ice volcanoes in outer space?” discusses the eruption of liquid water mixed with ammonia on Pluto’s neighbouring object, Charon. It discusses that on Charon the eruption quickly formed into an ice crystal structure. However though these points are just theory as there is no way at this current point in time for us to properly find out what is happening on Charon.
186,282 miles per second. That’s how fast light travels in the universe. Our Sun is 93 million miles away from the Earth, and it’s light reaches us in around 8 minutes. That may seem like a huge distance, but that is absolutely nothing compared to other objects in space. Neptune, known for its glorious blue color, is 2.7 billion miles away.
John Herschel discovered Uranus in 1781 while searching for double stars. There had been recent developments in Newton’s mathematics that would allow astronomers to calculate the orbits of celestial bodies and he wanted to learn more about the physical nature of stars. When he first saw Uranus through his seven-foot reflecting telescope, he thought it was a comet. Very few astronomers believed there was a possibility of more planets, other than the five they knew of, the moon, and the sun. It wasn’t until a Russian astronomer calculated the orbit of the “comet”, following a slow moving path, that it was determined that it was a planet.
The motion of all the material in the Universe is affected by gravity. Gravity helps the galaxies rotate and the planets in the solar systems orbit. 4. How do galaxies vary? Galaxies vary based on size, composition, and structure, however most all of them are arranged in clusters.
Though Einstein’s theory of relativity has been responsible for serious scientific and technological advancement, Einstein initially proposed his theories from his own thought experiments, considering previous theories and reaching contradictions or abnormalities. An example of this is, “what would happen here on Earth, if the sun suddenly disappeared?”. If Earth broke out of it’s gravitational orbit, and took a different trajectory, before the sun’s rays could reach the observers on Earth (8 minutes), then essentially gravity travels faster than the speed of light. A contradiction.
It is 75 degrees Fahrenheit and it is sunny. I can feel the heat of the sun warming my back. My energetic little Pomeranian is bouncing around the green yard. As soon as the sun hits her black fur, she topples over and exposes her belly, asking for a belly rub.
Although the compass was not an available resource, sundials were. Sundials originated from Egypt in 1500 B.C and since then they have been used throughout the world to keep track of the time (Sundial). For the Vikings purpose, the dial was used to depict the time of day, which could then show the direction one was sailing based on the suns location and movement throughout the sky. As the celestial navigation relied on a particular setting, as did the sundials. Without the sun shinning the dial would be unable to cast a shadow pointing to a particular time, therefore the direction could not be found.