The Polaris Dawn crew Jared Isaacman, Scott "Kidd" Poteet, Sarah Gillis and Anna Menon explain the experiments conducted ...

The OSIRIS-REx spacecraft's name has been changed to OSIRIS-APEX for its new mission to asteroid Apophis. See its journey to ...

A new investigation into old Kepler data has revealed that a planetary system once thought to house zero planets actually has ...

Earth’s orbit and our calendar, though, don’t align exactly, so the dates of the summer solstice can vary over time. This year, the day of the summer solstice is June 20.

Cosmic rays hit Earth’s atmosphere all the time, but most are too weak to detect. A few, however, carry extreme energy: more than a million times what particle accelerators on Earth can produce. A new ...

Astronomers observed Cosmic Dawn, 800 million years post-Big Bang, with Earth-based telescopes. This era marked the formation of the first stars and galaxies, ending the cosmic dark ages.

For the first time, scientists have used Earth-based telescopes to look back over 13 billion years to see how the first stars in the universe affect light emitted from the big bang. Using telescopes ...

For the first time, scientists have used Earth-based telescopes to look back over 13 billion years to see how the first stars in the universe affect light emitted from the Big Bang.

The Earth and Moon orbit a point around 5,000 kilometers (3,100 miles) from the center of the Earth, though this changes as the Moon moves further and further away from the Earth.

Astronomers report the first successful use of Earth-bound telescopes to peer over 13 billion years back in time to observe conditions in our universe shortly after the Big Bang, which astronomers ...