One for the future: NASA's Wide-Field Infrared Survey Telescope will aim to answer fundamental questions about the universe, dark energy and exoplanets. (Courtesy: NASA) NASA’s Wide-Field Infrared Survey Telescope (WFIRST) is expected to become a formal project ne You’ve reached the limit of what you can view on Physics World without registering If you already have an account on Physics World, then please sign in to continue reading If you do not yet have an account, please register so you can Access more than 20 years of online content Choose which e-mail newsletters you would like to receive Want to read more? Registration is free, quick and easy Note: The verification e-mail to complete your account registration should arrive immediately. However, in some cases it takes longer. Don't forget to check your spam folder. If you haven't received the e-mail in 24 hours, please contact customerservices@ioppublishing.org. E-mail Address