Saturn is below Venus and very low in the predawn sky. In late April it is five degrees above the horizon. You may need ...

Believe it or not, we've seen a few optical illusions in space over the year. Well, we haven't seen them – the Hubble ...

Dark energy, this still mysterious force that accelerates the expansion of the Universe, may have reversed in the distant ...

Six overlapping observations taken using the Hubble Space Telescope at both visible and infrared wavelengths were combined to ...

Scientists suspected the ice giant hosted auroras—and had already observed them on Jupiter, Saturn and Uranus. But an ...

Combining this image with Hubble observations that were taken in 1994 reveal how individual knots and filaments of gas move over time. This year, space enthusiasts can also take part in NASA ...

Galaxies like the Milky Way boast more than spirals; they also have feathers, where clumps of new stars are born. Astronomers ...

Vivian Poulin asks if the tension between a direct measurement of the Hubble constant and constraints from the early universe ...

Combining this snapshot with Hubble observations from 1994 will reveal the motion of individual knots and filaments of gas over that span of time, enhancing our understanding of this stunning nebula.

Hubble images show two KBOs located about 4,700 miles (7,600 kilometers) apart. However, researchers say that repeated observations of the objects' unique co-orbital motion indicate the inner ...

According to the Hubble observations, it's possible that the innermost worlds could have dumped more than 20 times the volume of Earth's oceans into space over the course of the last 8 billion years.