How do the motions of the Sun and planets reflect the disk shape of the solar nebula?

What will be an ideal response?


The solar nebula theory supposes that planets form in the rotating disks of gas and dust around young stars. The evidence is strong that our own planetary system formed in such a disk-shaped cloud around the Sun. When the Sun became luminous enough, the remaining gas and dust were blown away into space, leaving the planets orbiting the Sun.

Physics & Space Science

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A mountain top is an especially good site for infrared telescopes since:

A) there you are closer to celestial objects. B) you are above most of the carbon dioxide and water vapor in the atmosphere. C) the cold weather helps the sensitivity of infrared detectors. D) less air above means better seeing in many cases. E) All of the above are factors.

Physics & Space Science

The windings of a motor have a resistance of 4.0 ?. The counter emf of this motor when connected to a 120-V line and running at full speed is 104 V

(a) What is the start up current of this motor? (b) What is the current in the motor when running at full speed?

Physics & Space Science

What is the primary way in which stars with masses similar to the Sun ultimately return some of their material to the interstellar medium?

A) by exploding as white dwarf supernovae B) through jets they may have during the protostar stage C) through planetary nebulae D) through the winds they have during their main-sequence lives E) Stars with masses similar to the Sun do not recycle any material back into the interstellar medium.

Physics & Space Science

Mars' mass is only a tenth of the Earth's, and its density is also less than the Earth's

Indicate whether the statement is true or false

Physics & Space Science