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| caption = Enhanced-color view of Phobos obtained by ''[[Mars Reconnaissance Orbiter]]'' on March 23 2008. | inclination = 1.093[[degree (angle)|°]] (to Mars's equator)<br/>0.046° (to local [[Laplace plane]])<br/>26.04° (to the [[ecl ...

...proach to the [[magnetopause]]. For stars, this border is usually the edge of the [[Stellar-wind bubble|astrosphere]], where the stellar wind meets the [ ...rops from "[[supersonic]]" to "subsonic", where [[Speed of sound|the speed of sound]] c_s is defined by ...

...the right of an orange circular object representing the Sun| Artist's idea of the [[Earth]] several billion years from now, when the [[Sun]] is a [[red g The ultimate fate of our [[universe]] may be the [[heat death of the universe]] or the [[big rip]]. Before that happens, it is possible to p ...