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Australia-QLD-ST LUCIA SOUTH Κατάλογοι Εταιρεία
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Εταιρικά Νέα :
- What causes a falling star? - NASA
Meteors are commonly called falling stars or shooting stars If any part of the meteoroid survives burning up and actually hits the Earth, that remaining bit is then called a meteorite At certain times of year, you are likely to see a great number of meteors in the night sky
- StarChild: Meteoroids - NASA
Most meteors glow for only a few seconds prior to burning up before hitting the Earth's surface On most dark nights, meteors can be seen The chance of seeing a meteor with the unaided eye increases after midnight People often refer to meteors as "falling" or "shooting" stars The brightest of the meteors are called fireballs
- What causes fireballs in the sky? - NASA
This photograph shows one of the meteorites which survived the "Chicago Fireball"
- Star Art - An Introduction to Myths of Different Cultures - NASA
Star watching has occupied humans from the earliest times Our ancestors studied the night sky and saw shapes and patterns among the stars They often made up stories to explain what they saw The same star constellation was seen very differently by people from different countries, or even different parts of the same country
- StarChild: Comets - NASA
The Oort Cloud is believed to surround our solar system and reach over halfway to the nearest star, Alpha Centauri, which is 150,000 astronomical units away Scientists think that about 100 million comets orbit the Sun A comet has a distinct center called a nucleus
- Are all stars in a galaxy? - NASA
The observations show that the motion of the individual star is governed by the gravitational field of the cluster as a whole, rather than the pull of any one galaxy In other words, they are truly "intergalactic", or between galaxies
- Why do stars twinkle? - NASA
To our eyes, this makes the star seem to twinkle You will notice that stars closer to the horizon will appear to twinkle more than other stars This is because there is a lot more atmosphere between you and a star near the horizon than between you and a star higher in the sky Go out some night soon and have a look!
- How can the Sun burn? - NASA
This heating eventually grows out from the center (or core) of the star to the outside, finally leaving the surface and radiating out into space to be the heat and light we know stars emit People, including scientists, sometimes say that the Sun "burns hydrogen" to make it glow
- 88 Officially Recognized Constellations - NASA
Latin Name English Name or Description; Andromeda: Princess of Ethiopia: Antlia: Air pump: Apus: Bird of Paradise: Aquarius
- How long does it take to fly to Saturn? - NASA
The nearest star (after our Sun, of course!) is Proxima Centauri at a distance of 4 2 light years At a speed of 17 km sec (such as what the Voyager 1 spacecraft currently has), it would take about 75,000 years to reach Proxima Centauri This may explain why we are not planning any trips there at present!
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