All categories

3 years ago

Which feature signifies to astronomers that a distant star is part of a planetary system

Physics

2 answers:

Romashka-Z-Leto [24]3 years ago

8 0

Because it also can be apart of the milky way galaxy

liq [111]3 years ago

6 0

Answer: a) The star periodically dims.

A star is the body of gas in which nuclear fusion of gases like helium and hydrogen takes place due to this reason the star glows or dim. Star gets the ability to generate light because of this nuclear fusion which cannot be observed in planets although the process of generation of star and planet is the same. In distantly located star under observation, it's luminosity ( the property of emitting lighting) is controlled by size of the star, the larger the size of the star it will have greater surface area the more profound will be the nuclear fusion in it and more light will be emitted. Second factor is the gaseous interaction of gases in and around the star and their temperature which causes the change in the light which has to pass through a layer of these gases. Therefore, the distant star observed will show light fluctuations.

You might be interested in

An airplane traveling at one third the speed of sound (i.e., 114 m/s) emits a sound of frequency 3.72 kHz. At what frequency doe

nlexa [21]

Answer:

f'=5.58kHz

Explanation:

This is an example of the Doppler effect, the formula is:

$f'=\frac{(v+v_o)}{(v+v_s)}f$

Where f is the actual frequency, $f'$ is the observed frequency, $v$ is the velocity of the sound waves, $v_o$ the velocity of the observer (which is negative if the observer is moving away from the source) and $v_s$ the velocity of the source (which is negative if is moving towards the observer). For this problem:

$f=3.72kHz\\v=342m/s\\v_o=0m/s\\v_s=-114m/s$

$f'=\frac{(342+0)}{(342-114)}3.72\times10^3\\f'=\frac{342}{228}3.72\times10^3\\f'=(1.5)3.72\times10^3\\f'=5580Hz=5.58kHz$

5 0

3 years ago

You have a motion security light by your door cat runs across the in the light turns on what is the input of the system and what

Neporo4naja [7]

A motion security line is a system that is used to detect motion.
The input for the system is MOTION and the output is LIGHT. That is, when the system detects motion it switch on light.
Remember, an Input is the information that was inserted into a system while the output is the result of the processed information.

5 0

3 years ago

What is the relationship among amplitude,crest,and trough?

Musya8 [376]

These are characteristics of a wave. The amplitude is how high and low the waves go. Crests are high points on the wave, and troughs are low points on the wave.

5 0

4 years ago

How do scientific tests help determine the properties of substances

tino4ka555 [31]

It can help determine substances that appear similar but react differently under the same circumstances.

7 0

3 years ago

How many neutrons are present in an atom of Iron-54

Flura [38]

there are 28 neutrons present

3 0

3 years ago