Astronomy definition??!?
The phenomena by which the moon is moving away from the earth and this can be measured. Currently about 0.038 m/yr (1.5 inches per year).
What is the definition of an inverse angle for astronomy (especially asteroids)?
inverse angle in astronomy= the angle that is the polarization direction changes at that point. (from plus(+) to mines(-))...finally, ı found this defination.ref: Cellino Florence,2013-- COST Meeting - Firenze, INAF --Osservatorio Astrofisico di Torino 23/09/2013
In astronomy, what is the definition of "deep space"?
In astronomy, what is the definition of "deep space"?In common usage, deep space: is space well outside the Earth's atmosphere and especially that part lying beyond the Earth-Moon system.Astronomers on the other hand tend to be more specific in describing, INTERPLANETARY space, INTERSTELLAR space, or INTERGALACTIC space,or referring to space in particular systems of planets and their moons, rings, radiation-belts etc. asteroid belts, or named solar-systems etc.(eg. Centauri system).
Why do astronomers care about the definition of a planet?
There are things orbiting the Sun that are no bigger than my car. Are they planets? At some point you have to decide what is a planet and what is not. If your definition cuts out a planet that was once thought to be a lot bigger than it really is, then you can do either of two things. Cut out the planet from the definition or modify the definition. By majority vote in August 2006 the International Astronomy Union decided to do the first.
What is Time Zero in astronomy ?
Unless you mean Time Zero as a BBC book "Time Zero", the only thought I have is you mean T = 0 as in Time = Zero. ^ In a rocket launch, you will hear T minus x (where x is the seconds before zero - launch time) So T zero will be launch time.
How do astronomers and astrophysicists feel about a new definition for planets?
I like the original definition: Wanderer. The Greeks thought that planets were just things that wandered across the sky with respect to the stars.By that definition, pretty much everything orbiting the sun is a planet.But that’s a bit of a mess. So, please see:Dave Consiglio's answer to Are bodies that orbit a brown dwarf considered to be planets, or moons?My proposal:If you’re round, you’re a “World”.If you’re lumpy, you’re a “Body”.If you’re tiny, you’re a “Mote”.If you orbit the star, you’re a “primary”If you orbit a primary world, you’re a “secondary”.So, Pluto would be a primary world of the solar system. Deimos would be a secondary body. Saturn’s rings are made of secondary motes. Earth is a primary world. The Moon is a secondary world.