US businesses are more than 100 years away from gender equality in C-suite roles, Sheryl Sandberg the chief operating officer of Facebook Inc. and the founder of LeanIn.Org wrote in a recent article for the Wall Street Journal.

Senior executive roles are referred to as C-suite roles because they typically begin with the letter C.

Writing for the Wall Street Journal she said: “At the current pace of progress, we are more than 100 years away from gender equality in the C-suite. If NASA launched a person into space today, she could soar past Mars, travel all the way to Pluto and return to Earth 10 times before women occupy half of C-suite offices. Yes, we’re that far away.”

Her comments came after LeanIn.Org and McKinsey & Co. release the results of the Women in the Workplace 2015 study which surveyed 30,000 employees across America. According to Sandberg the study found that women are still underrepresented at every corporate level.

Sandberg said that women see “a workplace tilted against them” and are “twice as likely to believe their gender will make it harder to advance.”

She added: “The unfortunate reality is that women at every stage in their careers are less interested than men in becoming a top executive. Contrary to popular belief, this is not solely rooted in family concerns.”

The research found that even women without children cited stress and pressure as their main issue with advancing to an executive role.

She advised companies to track their “progress on diversity—measuring their pipelines in all functions and at all levels, as well as compiling cultural and attitudinal data.”

Sandberg concluded: “Change is never easy. But we can achieve great gains faster than anyone believes. We reached the moon in eight years of concerted effort—not 80. Let’s bring that same urgency to this mission. We will achieve not just a stronger and more successful workplace, but also increased economic growth and benefits for all our workers and families.”