ADDENDUM TO PRODUCT MANUAL
... you do not know a single star in the sky, the NexStar will have you aligned in minutes by asking for basic information like the date, time and location. Then you simply need to aim the telescope to any three bright celestial objects in the sky. Since SkyAlign requires no knowledge of the night sky i ...
... you do not know a single star in the sky, the NexStar will have you aligned in minutes by asking for basic information like the date, time and location. Then you simply need to aim the telescope to any three bright celestial objects in the sky. Since SkyAlign requires no knowledge of the night sky i ...
Celebrating the centennial of a celestial yardstick
... liberal,” but that may have been sheer politeness. Although the average American wage in 1902 was just 22 cents an hour, this was at a time when just 6 percent of Americans were high school graduates. For a college graduate — even if she suffered the economic disadvantage of being female — a wage of ...
... liberal,” but that may have been sheer politeness. Although the average American wage in 1902 was just 22 cents an hour, this was at a time when just 6 percent of Americans were high school graduates. For a college graduate — even if she suffered the economic disadvantage of being female — a wage of ...
The Supermassive Black Hole in the Center of the Milky Way
... tion. When corrected for interstellar scattering effect, the intrin- ...
... tion. When corrected for interstellar scattering effect, the intrin- ...
Astronomy 103 – Midterm 2 – October 29, 2014
... 35. When visible light from a star passes through interstellar dust, the light a) ionizes the dust, which then emits blue and ultraviolet light b) is dimmed and becomes bluer c) is dimmed and reddened d) primarily excites electrons in the silicon atoms of the dust. We observe ultraviolet light when ...
... 35. When visible light from a star passes through interstellar dust, the light a) ionizes the dust, which then emits blue and ultraviolet light b) is dimmed and becomes bluer c) is dimmed and reddened d) primarily excites electrons in the silicon atoms of the dust. We observe ultraviolet light when ...
Section 19.2
... • Luminosity is the total amount of light given off by a star in all directions. • Luminosity is a fundamental property of a star whereas brightness depends on both luminosity and distance. ...
... • Luminosity is the total amount of light given off by a star in all directions. • Luminosity is a fundamental property of a star whereas brightness depends on both luminosity and distance. ...
Astrophotography
Astrophotography is a specialized type of photography for recording images of astronomical objects and large areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1840, but it was not until the late 19th century that advances in technology allowed for detailed stellar photography. Besides being able to record the details of extended objects such as the Moon, Sun, and planets, astrophotography has the ability to image objects invisible to the human eye such as dim stars, nebulae, and galaxies. This is done by long time exposure since both film and digital cameras can accumulate and sum light photons over these long periods of time. Photography revolutionized the field of professional astronomical research, with long time exposures recording hundreds of thousands of new stars and nebulae that were invisible to the human eye, leading to specialized and ever larger optical telescopes that were essentially big cameras designed to collect light to be recorded on film. Direct astrophotography had an early role in sky surveys and star classification but over time it has given way to more sophisticated equipment and techniques designed for specific fields of scientific research, with film (and later astronomical CCD cameras) becoming just one of many forms of sensor.Astrophotography is a large sub-discipline in amateur astronomy where it is usually used to record aesthetically pleasing images, rather than for scientific research, with a whole range of equipment and techniques dedicated to the activity.