# James Webb Tracker
> Live mission tracking and editorial coverage of the world's flagship space telescopes - JWST, Hubble, Roman, Chandra - plus an editorial blog covering exoplanets, cosmology, and active NASA missions.

## Telescope project pages
- [James Webb Space Telescope (JWST)](https://jameswebbtracker.com/projects/jwst): Live status, mirror and instrument profiles, gallery, and science output of NASA/ESA/CSA's flagship infrared observatory at Sun-Earth L2.
- [Hubble Space Telescope](https://jameswebbtracker.com/projects/hubble): The 35-year-old optical/UV/near-IR observatory in low Earth orbit. Mission profile, servicing missions, science highlights.
- [Nancy Grace Roman Space Telescope](https://jameswebbtracker.com/roman): NASA's next wide-field infrared survey mission - 2.4 m mirror, ~100x Hubble's field of view, targeting launch by May 2027 to Sun-Earth L2 to study dark energy and complete the exoplanet census.
- [Chandra X-ray Observatory](https://jameswebbtracker.com/projects/chandra): NASA's flagship X-ray telescope.

## Active mission trackers
- [Artemis II](https://jameswebbtracker.com/artemis-ii): Crewed lunar flyby mission tracker.
- [Artemis II Splashdown](https://jameswebbtracker.com/artemis-2-splashdown): Live splashdown countdown.

## Explore Hub
- [APOD - Astronomy Picture of the Day](https://jameswebbtracker.com/explore/apod)
- [Upcoming Rocket Launches](https://jameswebbtracker.com/explore/launches)
- [Mars Rover Imagery](https://jameswebbtracker.com/explore/mars-rovers)
- [People in Space](https://jameswebbtracker.com/explore/people-in-space)
- [Space Weather](https://jameswebbtracker.com/explore/space-weather)
- [Tonight's Sky](https://jameswebbtracker.com/explore/tonight-sky)
- [Confirmed Exoplanets](https://jameswebbtracker.com/explore/exoplanets)
- [Cosmic Calendar](https://jameswebbtracker.com/explore/cosmic-calendar)
- [Recent Discoveries](https://jameswebbtracker.com/explore/discoveries)

## Editorial
- [Space Telescope Blog](https://jameswebbtracker.com/blog): Editorial coverage of JWST, Hubble, Roman, Chandra, exoplanets, and cosmology. English and Spanish.

## Sitemaps
- [Main sitemap](https://jameswebbtracker.com/sitemap.xml)
- [News sitemap](https://jameswebbtracker.com/news-sitemap.xml)
- [Blog sitemap](https://jameswebbtracker.com/blog-sitemap.xml)

## Key facts about the Nancy Grace Roman Space Telescope
- Primary mirror: 2.4 m (same as Hubble), donated to NASA by the National Reconnaissance Office in 2012.
- Field of view: at least 100x larger than Hubble's, covering about 0.28 square degrees.
- Wavelength range: 0.5 - 2.3 micrometers (visible to near-infrared).
- Orbit: Sun-Earth Lagrange point 2 (L2), about 1.5 million km from Earth.
- Launch target: by May 2027, with launch readiness as early as October 2026, on a SpaceX Falcon Heavy from Kennedy Space Center.
- Primary mission duration: 5 years, with 10+ year design margin.
- Instruments: Wide Field Instrument (WFI, 300-megapixel near-infrared survey camera) and Coronagraph Instrument (CGI, high-contrast direct-imaging technology demonstrator).
- Mission management: NASA Goddard Space Flight Center (project + spacecraft + WFI), JPL (CGI), STScI and IPAC (science operations and data).
- Renamed from WFIRST in May 2020 to honor Nancy Grace Roman, NASA's first Chief of Astronomy and the "mother of Hubble".

## Key facts about JWST
- Operator: NASA / ESA / CSA, launched December 2021.
- Primary mirror: 6.5 m segmented gold-coated beryllium.
- Wavelength range: 0.6 - 28 micrometers (near-IR through mid-IR).
- Orbit: Sun-Earth L2.
- Operated by STScI in Baltimore.

## About this site
James Webb Tracker (jameswebbtracker.com) provides editorial mission tracking, real-time countdowns, deep project explainers, and an iOS + Android app. Content is original and human-edited.