A space telescope for infrared spectroscopy of Earth-like planets

J. R.P. Angel, A. Y.S. Cheng, N. J. Woolf

Research output: Contribution to journalArticlepeer-review

117 Scopus citations


Owen1 has reviewed the potential for detecting life on Earth-like planets of nearby stars, from atmospheric spectra. The presence of oxygen, as revealed, for example, by the 7,600-Å absorption band, would be of particular significance. But even the direct detection of a Jupiter-like planet around the nearest star is a formidable task, perhaps just possible with the Hubble Space Telescope2,3 or with a Michelson interferometer operating at 40-μ wavelength4. Earth-like planets, being fainter and closer in, are still more difficult. Here we show that a space telescope of 16 m diameter, apodized in a new way, could image and measure oxygen in the thermal infrared spectra of earthlike planets up to 4 pc away. Several interesting candidate stars lie within this distance.

Original languageEnglish (US)
Pages (from-to)341-343
Number of pages3
Issue number6077
StatePublished - 1986

ASJC Scopus subject areas

  • General


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