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Retrograde motion is in the direction opposite to the movement of something else, and is the contrary of direct or prograde motion.
The term is often used when discussing the APARENT motion of the outer planets against the background of the fixed stars.
The planets outside the orbit of the Earth appear to move backwards along their orbital paths as our planet (Earth) overtakes them each year. They do not actually start orbiting backwards, it is a line of sight effect caused by OUR shifiting viewpoint.
Apparent motion is motion as it is viewed compared to something else.
For instance, the Earth rotates counterclockwise when viewed from above the North Pole.
If you view Earth from above the South Pole the apparent motion is clockwise.
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoMars takes longer to travel round the Sun than we do, so when we are passing Mars, which happens at its closest approach, called opposition, it appears to go backwards on the ecliptic from one day to the next.
It's the same as when you overtake another car, it appears to go backwards.
Wiki User
∙ 12y agoprograde rotation!
The only retrograde rotations are Venus and Uranus.
^^
Wiki User
∙ 12y agoIt's an apparent motion. You can be sure that Mars does not stop and reverse
direction in its orbit twice every time Earth passes by, just to attract our attention.
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What is the apparent depth of an object whose real depth below the water surface is 5 m?
its apparent depth is 1.5m.
What are the differences between real depth and apparent depth?
They are spelled differently.
What is apparent weight?
Apparent weight of an object is the weight of an object when the object is partially or totally immersed in a fluid{liquid/gas} normally apparent weight of an object is less than the real weight of an object due to an upward force {upthrust} which is produced by the pressure difference inside the fluids.
Does motion have to be based on a frame of reference?
Yes it does. That's the only way that motion makes sense. There's no such thing as "real" motion. It's always motion compared to something else. Have you ever read a book that you held in your hand while you sat in an airliner flying along over the ground at 400 or 500 miles per hour ? Referred to the ground, you were moving at 400 or 500 miles per hour, and so was the book. Referred to you, the book wasn't moving at all. Which motion was the "real" one ? Both of them were real, and neither one was more real than the other one.
What is the apparent weight of a submarine that weighs 1256N and it displaces 1562N of water?
Apparent weight = Fg - Fb = 1256 - 1562 = -306 N so in this case buoyance force is greater than its real weight so it must be rising to the water surface and floats.
What planet was used to explain retrograde motion?
Retrograde motion is motion in the opposite direction. In the case of celestial bodies, such motion may be real, defined by the inherent rotation or orbit of the body, or apparent, as seen in the skies from Earth.
What is responsible for the patterns of motion of all celestial objects?
Gravity for the real motion, the Earth's rotation for the apparent motion.
Is the word retreats a real word?
Yes I have a Golden Lab and she retrieves deer antlers. Yes. It describes retrograde motion. "The French army retreats when it encounters an enemy."
What causes the apparant movement of stars in the sky?
The real motion of stars is hardly noticeable even over a period of many years. It's the Earth's daily rotation the is the main cause of their apparent motion. (Stars are so far away that the Earth's revolution around the Sun hardly cases any apparent motion.)
What is meaning of real and apparent?
Real means existing in fact Apparent means obvious
What does it mean when Mercury is in retrograde?
When a planet is "in retrograde"; it appears to be moving backward in the night sky. Of course, it's not actually moving backward; that';s just an optical illusion caused by planets orbiting the sun at different speeds. When one overtakes the other, it can look like the other is moving backward from our vantage point on Earth.As for astrological implications, everyone complains about Mercury being in retrograde because it is serious bad news. According to astrology (which, I should note, is not real science), Mercury governs travel and communication, and when it’s in retrograde, you can expect problems in those areas—anything from a poorly worded email and slight flight delays to screaming matches and car crashes.Mercury is in retrograde until March 9, so hold on until then.
What are real name of Bruno Mars?
Peter Gene Hernandez is the real name of Bruno Mars.
What is the real name of Bruno Mars?
Bruno Mars' real name is Peter Gene Hernandez.
What is Mars candy's real name?
M&m mars
What is bruna mars real name?
Bruno Mars' real name is Peter Hernandez :] hope this helped :]
Formula to calculate real depth from apparent depth?
Real depth Dr= Apparent depth/ refractive index of water Dr= Da / n water
What is Mars raps real name?
MarsRaps name is Marshall "Mars" Manning
