A star with 150 solar masses would have a very short lifetime, estimated to be around a few million years.

Here's why:

* Massive stars burn fuel much faster: They have incredibly high core temperatures and pressures, causing them to fuse hydrogen into helium at a much faster rate than smaller stars.

* Shorter lifespan: The faster they burn, the quicker they exhaust their fuel supply.

Here's a general rule of thumb:

* A star's lifetime is inversely proportional to the cube of its mass.

* So, a star 150 times more massive than the Sun will have a lifespan roughly (1/150)^3 times shorter.

While a few million years might seem long, it's incredibly short compared to the Sun's lifespan of around 10 billion years. These massive stars live fast and die young!