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What is difference between apparent brightness and true brightness?
Apparent brightness: how bright an object - such as a star - looks to us. True brightness: how bright such an object really is. Defined as: how bright it would look at a standard distance.
The earth is moved from 1 au from the sun to 2 au from the sun how is the apparent brightness of the sun as seen from earth affected?
The apparent brightness of the sun would decrease because the intensity of sunlight weakens with distance. By moving the Earth from 1 AU to 2 AU, the distance between the Earth and the Sun doubles, resulting in a decrease in the amount of sunlight reaching Earth and causing a decrease in apparent brightness.
List three factors that control the apparent brightness of a star as seen from earth?
The apparent brightness of a star is determined by its luminosity (true brightness), distance from Earth, and any intervening dust or gas that may absorb or scatter its light. These factors affect how bright a star appears in the night sky to an observer on Earth.
What is similarities between apparent brightness and absolute brightness?
Both relate to brightness; both are measured in the same units; both are used for astronomical objects such as stars or galaxies.
How is the number of light years figured between two celestial objects?
To find the number of light years between two celestial objects, we first find the distance from each object to earth. If we connect the dots between Earth and the two objects, we have a triangle. We to sides lengths of that triangle (the distances between Earth and the objects), and we can measure one angle (the angle at the vertex where Earth is. This is enough information to find the distance between the objects using trigonometry (in this case, the law of cosines). Finding the distance from Earth to an object can be a bit complex. One commonly used method is to look for a pulsating star. We can figure out the absolute brightness (how bright it is without factoring in distance away) of these stars by how often they pulse. Then we can measure the apparent brightness (how bright it looks to us). We can then use both these values to find the distance to the star. (This also works for some supernovae.) Another method is to use objects that are considered to be 'standard candles'. These objects do not pulse, but we know the relationship between their absolute brightness, apparent brightness, and distance away.
What is difference between apparent brightness and absolute brightness?
Absolute Brightness: How bright a star appears at a certain distance. Apparent Brightness: The brightness of a star as seen from Earth.
What two factor affect a stars apparent brightness?
Two factors that affect a star's apparent brightness are: 1.) The distance between the Earth and the star 2.) The absolute magnitude (the actual brightness) of the star Hope that helps :P
What is difference between apparent brightness and true brightness?
Apparent brightness: how bright an object - such as a star - looks to us. True brightness: how bright such an object really is. Defined as: how bright it would look at a standard distance.
What is a situation involving apparent and absolute brightness while riding in a car?
While riding in a car at night, you might notice the apparent brightness of streetlights outside as you approach them, making them seem brighter. However, the absolute brightness of those streetlights remains constant regardless of your distance. As you pass by, their apparent brightness decreases, illustrating how perception changes with distance while the actual light output stays the same. This contrast highlights the difference between how we perceive brightness based on our proximity versus the true luminosity of the light source.
The earth is moved from 1 au from the sun to 2 au from the sun how is the apparent brightness of the sun as seen from earth affected?
The apparent brightness of the sun would decrease because the intensity of sunlight weakens with distance. By moving the Earth from 1 AU to 2 AU, the distance between the Earth and the Sun doubles, resulting in a decrease in the amount of sunlight reaching Earth and causing a decrease in apparent brightness.
If the distance between us and a star is doubled with everything else remaining the same the luminosity?
The luminosity of the star would decrease by a factor of four. Luminosity is directly proportional to the inverse square of the distance from the star. So, if the distance is doubled, the luminosity decreases by a factor of 2^2 = 4.
List three factors that control the apparent brightness of a star as seen from earth?
The apparent brightness of a star is determined by its luminosity (true brightness), distance from Earth, and any intervening dust or gas that may absorb or scatter its light. These factors affect how bright a star appears in the night sky to an observer on Earth.
What is different shape between apparent and absolute magnitude of stars?
This has nothing to do with shape. The apparent magnitude means how bright a star looks to us. The absolute magnitude means how bright the star really is (expressed as: how bright would it look at a standard distance).
What factors determind a stars apparent magnitude?
The star's real magnitude (brightness), its distance from us, and anything in between (usually dust or gas) which might absorb part of the light.
What is similarities between apparent brightness and absolute brightness?
Both relate to brightness; both are measured in the same units; both are used for astronomical objects such as stars or galaxies.
How can the sun have both a brightness of -26.73 and 4.83?
The Sun's brightness can be expressed in different ways depending on the context. The value of -26.73 refers to its apparent magnitude, which measures how bright the Sun appears from Earth, while the value of 4.83 typically refers to its absolute magnitude, which measures its intrinsic brightness at a standard distance of 10 parsecs (about 32.6 light-years). The significant difference between these values arises from the vast distance between the Sun and the standard measurement point, along with the effects of distance on perceived brightness.
How do we measure the distance between stellars?
With maths and light brightness.... Distance between two points...
