An example of one such mysterious observation would be gamma-ray bursters. We've known about these gamma-ray bursters for a long time now, but we can't all agree on what they are. 3.What could astronomers better estimate once they knew what nebulae really were? A. The diameter of ...
a. The earth, especially together with the life it supports: a chemical found all over the world; an ecological disaster that could threaten the entire world. b. The universe: how the ancients conceived the world. 2. a. Humankind considered as social beings; human society: turned her back...
Stargazers might like to try the venerable Webb Deep-Sky Society's Visual Atlas of the Magellanic Clouds, which is a guide to deep-sky objects such as emission nebulae, planetary nebulae, dark nebulae and star clusters in the Magellanic Clouds. To keep up to date with the latest research an...
A: Snow had the handle of the pump removed so that it could not be used. 3 Q: How ? A: The cholera threat was defeated thanks to the work of Joh Snow. 6 In groups, discuss the following questions. 1 What was the most important tool Snow used to defeat cholera? What common medica...
Born 1889, Hubble became the first American astronomer to identify Cepheid variables in M31 – which in turn established the extragalactic nature of the spiral nebulae. Continuing with the work of Carl Wirtz, and using Vesto Slipher’s redshifts, Hubble then could calculate the velocity-distance...
Electron energy transitions and ionization are the processes by which so-calledemission nebulaein space glow. Emission nebulae are oftenstar-forming regions, and are being ionized by the hard ultraviolet light from the young, massive starsborn within them. ...
This opens the doors to long exposure photos that include deep-sky objects such as galaxies and nebulae. Above all else – a star tracker or equatorial telescope mount is the single most important investment you’ll make in this hobby. ...
A phase could be as short as 24 minutes (near the equator) or several weeks (near the poles). At mid-latitudes, it can last anywhere from a half hour (fall to spring months) to one hour (summer months). For mid-latitudes, the Sun is at a lower angle with the horizon, so twiligh...
DSO AP is very complex and there are wrinkles, like narrowband imaging of emission nebulae. But they're wrinkles. The bottom line remains. Mono is better, but one shot color can make great images. And mono is very expensive. I have both, use them in different circumstances. Not rich, ju...
Instead, with an 8"-ish scope, globular clusters and planetary nebulae become cannon fodder! GC's can take magnification really well, and if they might not resolve they will be more readily visible than galaxies. PN's, armed with an Oiii filter you can bang away at dozens upon dozens. ...