Refractor telescopes are great for beginners ... they're not always great for astrophotography because of their curved focal plane, but for stargazing purposes they're excellent.

All 67 people on board the plane and the helicopter were killed in the crash. There's no indication the U.S. Army Black Hawk crew could tell there was an impending collision before its devastating ...

"President Trump is touring a new Boeing plane to checkout the new hardware/technology," said Steven Cheung, the White House communications director. "This highlights the project's failure to ...

Feb 15 (Reuters) - President Donald Trump toured a Boeing plane on Saturday to highlight delays in delivering new Air Force One aircraft, said the White House. The president negotiated with Boeing ...

Our examination shows how the American Airlines jet and the second plane, though separated by miles, would have appeared close to one another near the horizon and the helicopter crew could have ...

“We have a lot of work to do.” The collision was the deadliest plane crash in the US since 2001, when a jet slammed into a New York City neighborhood just after takeoff, killing all 260 people ...

Straight Shot: Hubble Investigates Galaxy With Nine Rings Feb. 4, 2025 — NASA's Hubble Space Telescope has captured a cosmic bullseye! The gargantuan galaxy LEDA 1313424 is rippling with nine ...

The James Webb Space Telescope has shown that the Milky Way’s black hole is constantly blazing with light, releasing long ...

Why? The most common reason is that magnification capability doesn’t match with the telescope’s objective size. In detail, it’s the objective focal length (FL or F). The bigger the objective size, the ...

President Donald Trump boards Air Force One at Joint Base Andrews, Md., Friday, Feb. 14, 2025, en route to West Palm Beach, Fla. (AP Photo/Ben Curtis) ...

(NewsNation) — Investigators with the National Transport Safety Board are looking at “conflicting information” about the altitude of a Black Hawk military helicopter that collided with an American ...

Other Lens Features Compatible Lenses Canon EF Lenses Including EF-S Lenses, Minimum Aperture f/22 - f/36, Closest Focusing Distance 0.39 m, Maximum Magnification 0.28x At 135 mm Focal Length, Field ...