Day: April 30, 2025

How to see a celestial ‘gazelle’ cross the night sky close to the Big Dipper this week

NeRD

With the constellation Ursa Major high in the sky, late April presents an ideal opportunity to spot the ‘Three Leaps of the Gazelle’ asterism – a set of three stellar pairings hanging below the Great Bear‘s most famous feature: the seven stars of the Big Dipper. The first mention of the Three Leaps of the Gazelle asterism was seemingly penned by the 13th century Arabic astronomer and mathematician Ulugh Beg, according to a 2021 post from the University of Arkansas at Little Rock. The three star pairings – an asterism…

Read More

Capture May’s full moon and the Eta Aquarid meteor shower with the best DSLR for astrophotography, now $600 off

NeRD

The Nikon D850 has been reduced from $2,396.95 to a staggering $1,796.95, which is an incredible discount if you’re in the market for one of the best DSLR cameras ever made. It’s the first time we’ve seen the D850 come in at under $2,000, even beating the Black Friday price (which was $2,196.95). Get the Nikon D850 for just $1,796.95 and save $600 at Adorama. Our resident camera guru, Jase Parnell-Brookes, called the D850 an astrophotography master, and Jase highlighted the Nikon D850’s brilliant design with its backlit buttons, excellent…

Read More

What can ripples in spacetime reveal about black holes? Quite a bit, it turns out

NeRD

Cosmic echoes from some of the universe’s most violent collisions are far more nuanced than scientists had realized, according to new research. Like the lingering chime of a struck bell, tiny ripples in the fabric of spacetime are created when massive objects like black holes spiral toward each other and merge into a single, larger black hole. These ripples are known as “gravitational waves,” and astronomers rely on theoretical models to decode the waves’ faint signals, both in the final moments leading up to the merger and in the aftermath.…

Read More

Sols 4522-4524: Up on the Roof

NeRD

Curiosity Navigation Curiosity Home Mission Overview Where is Curiosity? Mission Updates Science Overview Instruments Highlights Exploration Goals News and Features Multimedia Curiosity Raw Images Images Videos Audio Mosaics More Resources Mars Missions Mars Sample Return Mars Perseverance Rover Mars Curiosity Rover MAVEN Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions Mars Home 4 min read Sols 4522-4524: Up on the Roof NASA’s Mars rover Curiosity acquired this image of target “Hale Telescope” (the layered rock left of center) using its Left Navigation Camera on April 23, 2025 — Sol 4519,…

Read More