It is partly due to the internal design of the engine. The cylinder firing order has an effect. A lot of the sound is down to the design of the exhaust system.

Vehicle manufacturers will tune the exhaust system to get the sound they want. The sound from the exhaust system is affected by the length of the pipes and the amount and design of the silencers (mufflers).

American muscle cars don't rev as highly as European supercars which also has an effect on the sound. Lower revs results in a lower pitched sound.

Most mortgages are just like that in the UK too.

The sky was taken using a tracking mount so the stars won't trail. A separate photo of the landscape was taken and the sky was replaced with the tracked image.

Multiple photos of the sky were taken and stacked together to reduce noise and bring out the the faint details.