John Harrison, an original member of ’70s space rock band Hawkwind passed away on May 26, two days shy of his 70th birthday. His death was first reported on the band’s website. He’d been suffering from Huntington’s Disease and is said to have died peacefully.

According to Hawkwind.com, the bassist died after a weekend party to celebrate his birthday. “His face was so peaceful, and showed no signs that he’d been distressed,” the letter reads, “which is a great relief to us all, as it was expected that his final time could be quite traumatic.”

Though Harrison was an integral part of Hawkwind’s formation, he only appeared on their 1970 self-titled debut.