Even if Earth does survive, it won’t be pretty. The temperature of our planet will be about 1,300 degrees C, hot enough to ...

How Many Planets Are There in the Solar System? There are 8 planets in our solar system. The planets orbit the Sun in elliptical trajectories, and they are all different in size, composition, ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

For planets with more exaggerated eccentricities, the changing distance can have a bigger impact. Sunlight on Mars, for example, can vary as much as 31 percent along its orbit.

A new paper from Harvard's sometimes controversial physicist Avi Loeb has suggested that if we want to find advanced alien ...

The question of whether Earth is alone in harboring life has captivated humanity for millennia. In recent years, scientists ...

Sky-watchers will get a rare chance to see all the major planets in our solar system bunched together—with the moon joining the festivities, too, from June 17 to June 27.

Hubble Space Telescope observations of white dwarf star G238-44 has shown that it is "consuming both rocky-metallic and icy ...

"The Sun sends out a constant flow of charged particles called the solar wind, which ultimately travels past all the planets to some three times the ... the thruster without actually igniting it in ...

“We also find an approximately 0.3 percent chance that Mars will be lost through collision or ejection and an approximately 0 ...

Passing stars could trigger instability across the solar system, resulting in Earth being hauled out of its orbit.