Why moon does not fall to Earth?
The moon does not fall to earth because of its tangential velocity. The following video explains it well.
The initiative http://lunarscience.nasa.gov/ask-a-scientist/ by NASA will answer all your doubts on moon.
Categories: Ask Physics Tags: earth, moon, NASA, Neil Armstrong, planet, Solar System, space, Technology
Is the gravitational force between moon & earth are equal ?
Newton’s law of universal gravitation for two bodies. This law governs gravitational forces in the Earth. (Photo credit: Wikipedia)
Is the gravitational force between moon & earth are equal ?
If the question is- “Is the force exerted by earth on moon is equal to the force exerted by moon on earth?” then the answer is “Yes”
I hope that more questions will follow.
Please post your questions as comments to this post.
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Categories: Gravitation Tags: Astronomy, earth, gravitation, moon, NASA, Newton's law of universal gravitation, Planets, Solar System
Parallax Method to determine the distance of stars
WHAT IS THE WAY TO MEASURE THE DISTANCE OF DISTANT OBJECTS LIKE STARS WITH THE HELP OF PARALLAX METHOD
SHWETANSU asked.
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.
Astronomers use the principle of parallax to measure distances to celestial objects including to the Moon, the Sun, and to stars beyond the Solar System.
See the animation below to understand the parallax method for determining the stellar distances
Find more information here
http://spiff.rit.edu/classes/phys240/lectures/parallax/parallax.html
Aswin Ramesh Asked (via email)
is it the same method that we use in trigonometry ?
Answer:
Parallax is a different concept, though we are using the principle of trigonometry to solve problems based on it.
Categories: Ask Physics, AstroPhysics Tags: Arduino, BASIC Stamp, Boe-Bot, moon, Parallax, Solar System, star, sun
Questions received and waiting to be answered
Sreeda Asks
- Why are we not feeling Earth’s rotation while it is actually happening {1674.4 km/hr at the equator}?
- Our sound varies while communicating through a telephone. Why?
- Why is it more neat when we tear a sheet from the newspaper vertically and rough when torn horizontally?
- Will we be able to see stars during day time on the moon?
- Why do planets move in elliptical paths and not in circular ones?
- At what depth do Jupiter quakes occur?
Charan Asks
what is the difference between a atomic and a nuclear bomb?
sly nikie asks
what is crystal cleavage and what does it state about the nature of matter?
Categories: Ask Physics Tags: ask Physics, earth, moon, nature of matter, physics, Sreeda
