The gravitational interaction of a pair of galaxies creates this distorted spiral out of galaxy UGC 1810. A swath of blue jewels across the top is the combined light from clusters of intensely bright and hot young blue stars in this Hubble image.
The HubbleSite gallery has a number of attractive seasonal cards which you can print - or with some manipulation, put into emails. They've added graphics and a greeting to some beautiful Hubble Space Telescope images. You can easily use them through til the New Year.
Wow! Look at this stunning spiral galaxy (M74). The spiral arms are dotted with clusters of blue stars - they are hot young stars. There are also pink regions - these are emission nebulae where hydrogen is glowing from being energized by hot stars.
There are more images in the gallery. You can print the cards in various sizes or manipulate the images for e-cards.