Since 1990, the Hubble Space Telescope has given the world a new view of the universe. Explore the observatory’s history, design, operation, and cultural impact.
Soar through the universe with the Hubble Space Telescope, exploring some of its most significant discoveries – from dark energy to colliding galaxies.
The James Webb Space Telescope, Hubble’s successor, readies for the future of astronomy.
What is an eBook?
An eBook is an electronic book that can be read on tablets,
computers, and smartphones. Many of these devices use e-reader applications
for viewing books in specific formats.
Popular eBook formats
EPUB
An open standard format that can be read by many e-readers including Google Play Books, Firefox EPUBReader, B&N Nook, Kobo eReader, and Apple iBooks
PDF
A fixed-layout format supported by nearly all modern e-readers
KF8 MOBI
An Amazon proprietary format to be read on Kindle Fire devices using the Kindle app
iBook
An Apple proprietary format to be read on iPad devices using the iBooks app
