What is the difference between astronomy and astrology?
Do I need an expensive telescope to enjoy astronomy?
How does a telescope work?
Why can't I see very many stars at night? Where does space begin?
Why is the sky blue?
Why is the sky dark at night?
What is the speed of light?
Answers
Answer:
Astronomy is a science that studies everything outside of the earth's atmosphere, such as planets, stars, asteroids, galaxies; and the properties and relationships of those celestial bodies. ... Astrology, on the other hand, is the belief that the positioning of the stars and planets affect the way events occur on earth.
No, heck you don’t necessarily need ANY telescope. Astronomy is a huge subject. You can research and read about everything from string theory and dark matter to things NASA posts about from Mars probes and other solar system spacecraft.
But if observing is what you really want to do, here’s a few options to consider.
On the low end, an Orion Starblast 4.5 (or similar) provides enough aperture to actually see some detail in deep sky objects, though it’s short focal ratio will require at least a barlow lens or some additional eyepieces to see planets well due to the short focal length.
Alternatively, most and Dobsonian telescope 114mm or 150mm at f/8 focal ratio will provide wonderful views with just a few eyepiece additions. And an 8″ f/6 Dobsonian can last a lifetime.
Notice I keep mentioning Dobsonian reflectors? That’s because for the amount of money per millimeter of aperture, they are the best value. They require a little care, and occasional work to keep them in tip top shape, but it’s mostly minor. For those worried about collimation, the f/8 telescopes are a better choice. l
Hope that helps! Feel free to ask me any questions. And if you need help finding things in the night sky, I try and make regular
Most telescopes, and all large telescopes, work by using curved mirrors to gather and focus light from the night sky. ... The bigger the mirrors or lenses, the more light the telescope can gather. Light is then concentrated by the shape of the optics. That light is what we see when we look into the telescope.
Answer:
1.Astronomy is a science that studies everything outside of the earth's atmosphere, such as planets, stars, asteroids, galaxies; and the properties and relationships of those celestial bodies. ... Astrology, on the other hand, is the belief that the positioning of the stars and planets affect the way events occur on earth.
2.No
3.The reason for this is light pollution. Dust and water vapor in the atmosphere reflects the bright city lights back down towards the ground. This “light pollution” tends to be brighter than some of the dim stars and other deep sky objects, essentially hiding them from view.
4.As white light passes through our atmosphere, tiny air molecules cause it to 'scatter'. The scattering caused by these tiny air molecules (known as Rayleigh scattering) increases as the wavelength of light decreases. ... Therefore, blue light is scattered more than red light and the sky appears blue during the day.
5.The sky is dark at night, both because the universe had a beginning so there aren't stars in every direction, and more importantly, because the light from super distant stars and the even more distant cosmic background radiation gets red shifted away from the visible spectrum by the expansion of the universe.
6.The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is defined as 299792458 metres per second.