TMT construction begins Monday 15 July

[TomK]

Most arguments about not needing ground-based telescopes were shot down quickly, albeit unintelligible to those who rejected the reasoning. Chandra is a different beast; an X-ray observatory has to be in orbit; you can't detect cosmic X-rays from the ground. On the other hand, the next generation of large ground-based telescopes can do the job of the JWST or Hubble for a much lower cost and can be maintained and upgraded.