Does time exist?

Based on the velocity of light .

 

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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

✓

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Light measurement ? What does that even mean ?

Light year velocity ? What does that even mean ?

 

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What is the speed of light ?

 

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.

 

Apparently it is something for you to quibble relentlessly about.

 

NO

Correct. Qualifier a defined year

Please direct any further inquires to Professor Google

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Light year is though the distance that light travels in one year .

 

light year
ˈlīt ˈˌyi(ə)r/
noun
ASTRONOMY

1. 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"

 

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.

 

Your right

The thing is , most of us know this already

 

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

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Love it , snail years ahahah

 

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. 1.
   MATHEMATICSPHYSICS
   a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.

 

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.

 

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.

 

Troll. Deliberately stirring up the pot by pretending to be ignorant.