Works

• "The Other Side of Astronomy" in Astounding Science Fiction, 24 (01)
• Luna Observatory No. 1 (1940)
• Universes for Lenses (1940)
• Wanted: Suggestions (1940)
• Inside Out Matter (1941)
• Space Has a Spectrum (1941)
• Trepidation (1941)
• Vermin of the Sky (1941)
• Late-Model Stars (1942)
• No Handicap Allowed (1942)
• Stars Also Have Rings (1942)
• "Turn On the Moon—Make It Hotter!" (1943)
• Photographic Plate Finds Kepler's Nova (1943)
• Space Fix
  • "Space Fix" in Astounding Science Fiction, 31 (01)
  • "Space Fix" in Astounding Science Fiction, 31 (02)
• The World of 61 Cygni C (1943)
• "C" Frozen at 186272 (1944)
• Case of Apparent Time Acceleration (1944)
• Extra-Solar Planets (1944)
• Headstones For Astronomers (1944)
• Postwar Plan For Mars (1944)
• Time for a Universe (1944)
• Advance in the Red (1945)
• Engineering in Extremes (1945)
• Lots of Gold — But Get It! (1945)
• Prediction - Past Tense (1945)
• Prominences (1945)
• The Helpful Pleiades (1945)
• Second Approximation (1946)
• Calendar for Mars (1947)
• Man On Mira (1948)
• Paper Planets (1948)
• The Time of Your Life (1949)
• Making Worlds Collide (1951)
• Today It's Turbulence (1951)
• Wanted - Help! (1951)
• Four Centuries of Planets (1952)
• Science Briefs (If, November 1952)
• A Night on Mars Hill (1953)
• Dere Sir: "What Did You Do on the Moon?" (1953)
• Earth's Ghostly Companion in Space (1953)
• Icarus Brought to Earth (1953)
• Space Stations for Free (1953)
• Stargazing (1953)
• The Mystery of the Blue Mist of Mars (1953)
• "It's About Time ..." (1954)
• Blame It on the Sunspots (1954)
• Cosmic Shadows (1954)
• Exploring Mars (1954)
• Jove Intervenes (1954)
• Lost: One Magnetic Field (1954)
• Mercury Is Not Hopeless (1954)
• The Stars Are Closer Than You Think (1954)
• New Moons (1955)
• Star People (1955)
• The Day After We Land on Mars (1955)
• Island in the Sky (1956)
• Second Satellite (1956)
• Space Fix (1957)
• The Face of Mars (1957)
• The Facts About Life on Mars (1957)
• Every Astronomer Has His Horror Story (1958)
• La vie sur Mars [French] (1958)
• The Fascinating World of Astronomy (1960)
• Man and the Moon (1961)
• Mars [with Chesley Bonestell] (1964)
• An Eye For Selene (1965)
• Phobos: Moon or Artifact? (1965)
• Stella and the Moons of Mars (1965)
• Theories Wanted (1965)
• Comets Via the VJSEH (1966)
• Getting Acquainted with Comets (1967)
• Sun Grazers (1967)
• How to Kidnap a Moon (1969)
• Is the Star of Bethlehem Observable Today? (1973)
• Galaxy Stars appearing in Galaxy Magazine 33 (04)
• Which Polaris Do You Mean? appearing in Analog Science Fact/Science Fiction 72 (01)
• The Space Technology of a Track Meet appearing in Analog Science Fact/Science Fiction 75 (02)
• Venus and Mercury - Locked Planets appearing in Analog Science Fact/Science Fiction 80 (04)
• Icarus and Einstein appearing in Analog Science Fact/Science Fiction 81 (05)
• "On a Gold Vesta ... " appearing in Analog Science Fact/Science Fiction 82 (05)
• Ptolemy's Red Sirius appearing in Analog Science Fact/Science Fiction 86 (06)
• Are There "Bears" on Mars? appearing in Analog Science Fact/Science Fiction 95 (10)
• A Summing Up appearing in Astounding/Analog Science Fact & Fiction 65 (01)
• Needed: One Aphrodite Project appearing in Astounding/Analog Science Fact & Fiction 65 (06)
• "The Reference Library: There We Stand" in Astounding Science Fiction, 61 (05)
• Want to Bet ... appearing in Galaxy Magazine 32 (04)
• Want to Bet ... appearing in Galaxy Magazine 32 (05)
• Want to Bet? appearing in Galaxy Magazine 32 (06)

Posthumous works

• A Move Too Far (2009)

Some or all works by this author are in the public domain in the United States because they are legally published within the United States (or the United Nations Headquarters in New York subject to Section 7 of the United States Headquarters Agreement) before 1964, and copyright was not renewed.

• For Class A renewals records (books only) published between 1923 and 1963, check the Stanford University Copyright Renewal Database.
• For other renewal records of publications between 1922–1950 see the University of Pennsylvania copyright records scans.
• For all records since 1978, search the U.S. Copyright Office records.

It is imperative that contributors search the renewal databases and ascertain that there is no evidence of a copyright renewal before using this license. Failure to do so will result in the deletion of the work as a copyright violation.

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The author died in 1981, so works by this author are also in the public domain in countries and areas where the copyright term is the author's life plus 30 years or less. Works by this author may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.

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