There are only two significant figures in 240, and only one in 300. Please do not do metric conversions with more significant figures than your inputs.
On the contrary, please don't drop significant figures during intermediary calculations. But do round the final answer to 6.5.
Recommended and relevant reading is "A Mathematician’s Apology" by G. H. Hardy.
Available online at http://web.njit.edu/~akansu/PAPERS/GHHardy-AMathematiciansApology.pdf
Actually, the way we see it is the way it is "now", from our point of view. Remember that time is relative.
What this means is that there is no concept of "now" at the location of that galaxy that corresponds to our "now", apart from the point we are actually seeing.
There is no objective observer that can observe both points "at the same time", and in fact no such correspondance exists.
To answer your question: yes it does still exist, at least from our point of view of time.
Please don't monopolize the use of the word "we" to mean "EVERYONE". "We" could mean "me and my friend". It referers to a group of two or more people of which I am a member.
11 500 is two numbers
Well, if space is a thousands separator it's not.
And eleven thousand five hundred is four words. Still means only one number.
Don't design my car to get optimal MPG at 55...target 65, because that is highway speed.
Due to the laws of physics, the only way to make a car have optimal MPG at 65 is to reduce the efficiency at lower speeds.
You ALWAYS need more energy to keep the car running at 65, because of the air drag. The power usage due to air drag is proportional to the CUBE of the speed, so it increases very fast.
Science and religion are in full accord but science and faith are in complete discord.
