Venus blazes a bright magnitude –4.7 in the morning sky today. To its right, 1st-magnitude Saturn is also readily visible to the naked eye, while elusive Neptune lies between them. You'll have a ...

A decently dark site in a rural area has a sky background of about 21 mag/arcsec 2. In the Rocky Mountains in Colorado I’ve been to sites a bit darker than this, and it’s truly spectacular.

The Sky View XL is designed to fit three adults or a family of four atop its 90 x 90-in (229-cm) floor, retailing for $399. It pitches with heavier duty 19-mm (0.75-in) aluminum poles.

OBSERVATIONS of the diffuse X-ray background above approximately 20 keV, made from balloon platforms1–3, indicate a spectral index for the photon flux of at least 2 magnitudes. Recent rocket ...

The night sky is becoming increasingly filled with shiny satellites and space junk that pose a significant threat to our view of the cosmos, as well as astronomical research, a new study warns.

Venus blazes a bright magnitude –4.7 in the morning sky today. To its right, 1st-magnitude Saturn is also readily visible to the naked eye, while elusive Neptune lies between them.