Quantcast
issue
Read articles, including Science News stories written for ages 9-14, on the SNK website.
FOUR-ARMED MONSTER

Radio observations reveal the Milky Way galaxy must have four spiral arms: two dominant ones and two others that contain only newborn stars, as shown here in this artist's conception. Most star formation in our galaxy takes place in these spiral arms. Credit: Robert Hurt, IPAC; Mark Reid, CfA, NRAO/AUI/NSF

Follow Us
blogs & columns
multimedia
Not to miss
bookshelf