Based on the velocity of light .
Does time exist?
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Based on the velocity of light .
Noooooooo
A light year is a measurement
Only a measurement
Nothing but a measurement
Has always been a measurement
Never been or even pretended to be anything else than a measurement
Light has velocity ✓
Light year measurement ✓
Light measurement X
Light year velocity X
✓
Next
Noooooooo
A light year is a measurement
Only a measurement
Nothing but a measurement
Has always been a measurement
Never been or even pretended to be anything else than a measurement
Light has velocity ✓
Light year measurement ✓
Light measurement X
Light year velocity X
✓
Next
Light measurement ? What does that even mean ?
Light year velocity ? What does that even mean ?
Can't the speed of light be measured using trigonometry? Triangles etc. This is something I wondered about: if a (moving) mirror reflected light even faster, does this create a laser?
A light year is the distance light travels in a year.
A light year is the distance light travels in a year.
Gawdzilla Sama
Valued Senior Member
Apparently it is something for you to quibble relentlessly about.
NO
Correct. Qualifier a defined year
Please direct any further inquires to Professor Google
NO
Correct. Qualifier a defined year
Please direct any further inquires to Professor Google
Light year is though the distance that light travels in one year .
Gawdzilla Sama
Valued Senior Member
light yearNO
Correct. Qualifier a defined year
Please direct any further inquires to Professor Google
ˈlīt ˈˌyi(ə)r/
noun
ASTRONOMY
- a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 trillion miles).
- informal
a long distance or great amount.
"the new range puts them light years ahead of the competition"
- informal
Light travels distance X in one year and
is called a light year
The solar system does not travel at light speed and cannot travel a light year at light speed so is just a velocity.
A distance is a distance and a ly is a light year, there would be no need to call a distance a light year unless it was based on light.
I should hope most of you do.....
Correct of course
Which is what counter posted
I only fine tuned it to the extent of making it a defined year. As everyone should know the Earth year varies as do all planarity years
The DISTANCE is called a light year. And X is always the SAME
Astronomers use light years as a short hand method to express extremely large distances between bodies in the Universe which have vast distances between them
No one made a claim the solar system travels at the speed of light. If they did they are incorrect
****
The Solar System is traveling at an average speed of 828,000 km/h (230 km/s) or 514,000 mph (143 mi/s) within its trajectory around the galactic center,[3] a speed at which an object could circumnavigate the Earth's equator in 2 minutes and 54 seconds; that speed corresponds to approximately one 1300th of the speed of light.
https://en.m.wikipedia.org/wiki/Galactic_year
The Sun orbits the galaxy in 225 to 250 million years
https://www.quora.com/How-many-times-has-our-solar-system-orbited-the-galaxy
And as noted in the link, solar system has been around the Galaxy about 18 to 20 times
****
As I have noted already
Astronomers use light years as a short hand method to express extremely large distances between bodies in the Universe which have vast distances between them
So that is the need
I guess they used light because it travels a lot further in a year than snails do
So snail years would be a a stupidly large number
I guess they used light because it travels a lot further in a year than snails do
So snail years would be a a stupidly large number
Love it , snail years ahahah
DaveC426913
Valued Senior Member
Correct. That DISTANCE is called a light year.
Correct.
Incorrect.
A distance is a distance, not a velocity.
Correct.
And a mile is a mile, not a mile-per-hour.
It is called a light year because it is the distance it takes light to travel in one year.
DISTANCE.
It's a distance.
A light year is still a light year even if you traverse it at one mile per hour.
Which is contradictory to saying a light year.
1ly is equal to the time it takes for light to travel vector x , 1 ly is a vector , I was wrong it is not a distance or a velocity , it is a vector .
vector
ˈvɛktə/
noun
- 1.
MATHEMATICSPHYSICS
a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.
Gawdzilla Sama
Valued Senior Member
You quibble at the terminology you don't understand. Give it a break, you're not credible.
No.
No. 1LY is the DISTANCE covered by light in one year.
Thus showing that the light year is NOT a vector since no direction specified.
DaveC426913
Valued Senior Member
A mistake a lot of naive people make.
A light year is a distance.
At the speed of light, it takes one year to traverse it.
At 1 mile per hour, it takes 671 million years.
Oh for Pete's sake, you don't even know what a vector is.
DaveC426913
Valued Senior Member
Troll. Deliberately stirring up the pot by pretending to be ignorant.
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