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 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.

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 ...

INDIANA, USA — As soon as the sun sets, step outside and look up to witness a rare celestial event: full planetary alignment. Between Feb. 23 and Feb. 28, 2025, all seven planets will align in the ...

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.