... Gradually, the fierce stellar winds from the youngest most massive stars blow away the gas, revealing bright blue star clusters and giving a Swisscheese appearance to the spiral arms. ...
... He likened the early universe to a hunk of Swisscheese, where quasars cleared out zones of neutral helium gas in the intergalactic medium that were then т??piercedт?? by UV observations from the space telescope. ...
... The ice is frozen carbon dioxide (CO 2 ) dry ice and is sculpted into broad mesas, buttes, and small circular pits that, in some places, resemble stacks of thinly sliced Swisscheese. ...