You need a higher ISO as well as a bit longer exposure. It's dark out there.
Plus, having a camera that takes high ISO pictures without a lot of noise is also a must. In order to get photos of stars that aren't affected by star movement due to the earth's rotation, you need to shoot with a wider aperture and a high ISO. Note they are using some pretty expensive gear in that article ($2300-$6000). Also, specific astro-photography uses some pretty specialized gear.
Most consumer-grade DSLRs have a hard time with noise when you get to ISO 1600 or faster. Also, ISO noise and stars look a lot alike, so post-processing the noise away is a bit tricky. I'm not an expert on the high-end cameras they are using but I would imagine they handle high ISO a bit better than a medium or low-end SLR...let alone an intermediate like the SX10.
You may not be able to take this type of photo with the SX10 due to the exposure, aperture, and ISO noise limitations. I'm not that familiar with your camera though.