NASA has announced the release of two new and free e-books that are about the Hubble Space Telescope and its not-yet-launched successor.

NASA's two newly launched e-books that boasts of "interactive features that let readers watch a galaxy collision or manipulate a telescope model between pages" has created quite a buzz among astronomy lovers. The ebooks, "Hubble Space Telescope: Discoveries" and "Webb Space Telescope: Science Guide" can be viewed using iPads with the free iBooks app, claims the announcement.

"These new ebooks from NASA will allow people to discover Hubble and Webb in a whole new way - both the science and the technology behind building them," Amber Straughn, an astrophysicist on the Webb telescope project at NASA's Goddard Space Flight Center in Greenbelt, Md., said in a statement. "They collect all of the amazing resources about these two observatories in an excellent product that I think people will really enjoy."

The e-books will not only give readers the opportunity to view pictures taken from the telescope but also has interactive image galleries and video, the books' design team said

"For instance, the readers can watch a galaxy collision simulation video, manipulate a telescope model to see it from all angles, or flip through a gallery of planetary nebulae --all right there on the page," Tracy Vogel of the Space Telescope Science Institute in Baltimore said.

The ebooks are available at the Apple iBookstore or can be downloaded as a PDF from the Hubble's official website.