Original sentence: In recent years that line has been widely viewed as being in a state of decline with little advertising being done in astronomy magazines.The company has been notable for its line of consumer market telescopes that were known as the "Rolls Royce" of astronomical instruments
Edited sentence: At one time the company made telescopes that were known as the "Rolls Royce" of astronomical instruments.In recent years it has been widely viewed as being in a state of decline, unable or unwilling to embrace more recent technologies.With the failure of advertising in astronomy magazines, the company is no longer widely known or regarded by astronomers