NASA @NASA
From darkness, light. Dark nebulae are clouds of gas and dust that block visible light coming from behind them. But astronomers think these dense pockets of darkness might house nurseries for newborn stars, as seen in this @NASAHubble image: https://t.co/nOKkuyWkK3 https://t.co/YgD3AA9COV — PolitiTweet.org