Video: TDRS-M takes flight atop Atlas 5

Russian officials have delayed until Saturday the launch of a Proton rocket from Kazakhstan with the Spektr-RG X-ray astronomy observatory, an ambitious mission jointly developed with Germany to probe dark energy.

A new image from the James Webb Space Telescope shows a rare glimpse of a massive star 15,000 light-years away shedding a halo of gas and dust, seeding the cosmos with elements necessary for forming other stars, planets, and the building blocks of life.

A weather satellite set to bring new storm tracking capabilities to the western United States and the Pacific Ocean rode into space atop a United Launch Alliance Atlas 5 rocket Thursday.