Leap Seconds

Leap Seconds: A Brief Introduction

Unlike leap years, which require adding an extra day to the calendar every few years to keep the calendar year synchronized with the astronomical year or seasonal year, leap seconds are not utilized on a…

AeroJet M-1

Aerojet M-1

Larger and more efficient than the F-1 engine that powered the Saturn V to the Moon, the Aerojet M-1 was the largest and most powerful liquid-hydrogen-fueled liquid-fuel rocket engine to be designed and component-tested. The…

Bortle Scale International Dark Sky Association Buying Land

International Dark Sky Association

History The “International Dark-Sky Association (IDA) is a 501(c)(3) (tax ID #: 74-2493011) founded in 1988, and is dedicated to protecting the night skies for present and future generations.“[1] With a mission to “preserve and protect the…

Science Fiction

Science Fiction History Impact And History

For a definition of Science Fiction and different subgenres, please check out our article. This article is not meant to be exhaustive detailing of the science fiction history nor its impact, but rather a start…

Science Fiction

Overview Of Science Fiction And Types

2020 is a marks several anniversaries for science fiction media and science fiction genres. What is Science Fiction? Science Fiction is a genre of speculative fiction that typically deals with imaginative and futuristic concepts such…

Alternative Launch Systems

Future Alternative Launch Systems

With SpaceX launching and landing their 50th rocket, it is interesting to look at what could be the cheapest possible future alternative launch systems that could be developed. Present-day launch costs are relatively expensive, ranging…


Rocket Engine H-2038

Stationed at the Evergreen Aviation And Space Museum, this Rocketdyne H1A Rocket Engine is in great condition. Numbered H-2038, inventory number A19700286000, the engine is on loan from the Smithsonian National Air & Space Museum….