Greenwich Observatory
The Royal Greenwich Observatory overlooks the Thames Valley in this painting from ca. 1696. The observatory was established by decree…
Barnard’s Planets
An artist’s concept depicts a possible view from one of the four recently discovered planets orbiting Barnard’s Star, one of…
Messier 81
Messier 81 is a ‘grand design’ spiral galaxy, indicating that it has a well-defined spherical core encircled by almost perfect…
Saturn’s Divided Rings
Saturn’s rings encircle the giant planet in this view from the Cassini spacecraft. A dark gap in the ring system…
Rubin Observatory
Stars trail above the Vera Rubin Observatory, in the Andes Mountains of Chile. The observatory, which will repeatedly map the…
Gemini IV
Gemini IV astronaut Ed White floats outside his spacecraft during the first American spacewalk, on June 3, 1965. [NASA]
Callisto
An ocean of liquid water may lie below the icy, battered crust of Jupiter’s moon Callisto, which is shown in…
Iapetus
Saturn’s two-toned moon Iapetus is one of the most contrasting bodies in the solar system. One hemisphere is almost pure…
Omega Centauri
Omega Centauri, the largest star cluster in the Milky Way, sparkles in this view from Hubble Space Telescope. The cluster…
A Woman and Her Telescopes
Nancy Grace Roman, who was born 100 years ago, was a pioneer in the development of Hubble Space Telescope. At…