Reasons to Believe

Solar System Design

  • Planetary Collisions

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    Recent theoretical work suggests that more evidence for Earth’s life-supporting design may come from study of planetary collisions. Two … more

  • Solar System’s Rare Birth

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    Discovery of an element found on meteorite samples provides support for the anthropic principle, which maintains that the universe and Earth are … more

  • A Bright Young Sun

    Caltech astrophysicists Juliana Sackmann and Arnold Boothroyd have achieved a breakthrough. In spring 2003, they unveiled a new and more accurate model for the Sun’s life cycle, a model that … more

  • Planet Orbits and Bolides

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    An interdisciplinary team performed the first long term integration of the solar system’s planetary orbits. They found the orbits of the four … more

  • Bachelor Stars

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    A coronagraphic imager with adaptive optics on the Subaru Telescope detects two small stars orbiting what was previously catalogued to be nearby … more

  • Blue K Dwarf Stars

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    In studies of young open star clusters astronomers note that the younger the cluster the bluer and more variable are the medium and small-sized … more

  • Comets Growing Old

    TNRTB Archive - Retained for reference information

    A variety of studies show that solar system comets have aged. As many observations confirm, thermal heating from passing stars, collisions among … more

  • Planetary Orbits and Bolides

    TNRTB Archive - Retained for reference information

    An interdisciplinary team performed the first long term integration of the solar system’s planetary orbits. They found the orbits of the four … more

  • Extrasolar Planetary Systems

    TNRTB Archive - Retained for reference information

    Thirteen multiple planet systems have been discovered. These systems, however, all appear to manifest mean motion resonances and apsidal phase … more

  • Pre-Protostellar Cores

    TNRTB Archive - Retained for reference information

    Recent studies of pre-protostellar cores establish that astronomers really are witnessing and understanding the processes leading to the conception … more

  • The First Stars

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  • Young Solar-Type Stars I

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    Astronomers discover that solar-type stars younger than 50 million years, in addition to manifesting large unpredictable brightness changes, … more

  • Young Solar-Type Stars II

    TNRTB Archive - Retained for reference information

    Astronomers discover that spots on the surface of stars, even stars of the same mass as the sun, can attain such large sizes that they generate … more

  • Solar Irradiance Variability

    TNRTB Archive - Retained for reference information

    Astronomers discover that faculae, large-scale bright solar surface features, contribute 80% of the total solar irradiance variability. To keep this … more

  • Does the Sun Shrink?

    TNRTB Archive - Retained for reference information

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  • The Faint Sun Paradox

    Debates over global warming—how to measure it, the causes and effects, what to do about it and when—have raged for decades, with no resolution yet in view. Huge media coverage and … more

  • Fine-Tuning for Life on Earth (JUNE 2002)

    © 2002 Reasons To Believe

    Evidence for the Fine-Tuning of the Galaxy-Sun-Earth-Moon System for Life Support

    The environmental requirements for life to exist depend quite strongly on the life … more

  • Probabilities for Life on Earth (JUNE 2002)

    © 2002 Reasons To Believe

    An Estimate of the Probability for Attaining the Necessary Parameters for Life Support1-85

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    Probability that feature will Fall in the required … more

  • Fine-Tuning for Life in the Universe (JUNE 2002)

    © 2002 Reasons To Believe

    For physical life to be possible in the universe, several characteristics must take on specific values, and these are listed below.1 In the case of several of these … more

  • Sun’s Stable Fluctuations

    The Sun has the reputation of being the most stable burning star, astronomers observe. Its extreme stability allows humans to exist on Earth. But this stability won’t last forever.

    Over … more