PDA

View Full Version : Discussion: Hubble Took Its Time Watching ...



Fraser
2003-Sep-06, 10:43 PM
SUMMARY: The latest image released from the Hubble Space Telescope is of the spiral galaxy NGC 3370, located in the constellation Leo. The galaxy was imaged because astronomers wanted to observe Cepheid variable stars - special stars which brighten and dim at a known rate and are used to calculate distances to objects. The team had to make a long exposure of the galaxy (about a full day), so Hubble had a chance to gather a lot of light; that's why there are many fainter galaxies visible in the background of the picture.


Comments or questions about this story? Feel free to share your thoughts.