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Mullard Radio Astronomy Observatory – Introduction

Mullard Radio Astronomy Observatory (MRAO) is home to a number of large aperture synthesis radio telescopes, including the One-Mile Telescope, 5-km Ryle Telescope, and the Arcminute Microkelvin Imager. Radio interferometry started in the mid-1940s on the outskirts of Cambridge, but with funding from the Science Research Council and a donation of £100,000 from Mullard Limited, [...]

Amateur astronomy – Amateur astronomy objectives

Astronomy

Collectively, amateur astronomers observe a variety of celestial objects and phenomena. Common targets of amateur astronomers include the Moon, planets, stars, comets, meteor showers, and a variety of deep sky objects such as star clusters, galaxies, and nebulae. Many amateurs like to specialise in observing particular objects, types of objects, or types of events which [...]

Hartebeesthoek Radio Astronomy Observatory – The Radio Telescope

Radio Astronomy

The observatory is equipped with a single 260 ton radio telescope with a main reflecting surface diameter of 26 metres. The telescope is equipped with radio receivers operating in the microwave band at wavelengths of 18cm, 13cm, 6cm, 4.5cm, 3.5cm, 2.5cm and 1.3cm. Adapted from the Wikipedia article Hartebeesthoek Radio Astronomy Observatory, under the G. [...]

Radio telescope – Introduction

Optical Astronomy

radio telescope is a form of directional radio antenna used in radio astronomy. The same types of antennas are also used in tracking and collecting data from satellites and space probes. In their astronomical role they differ from optical telescopes in that they operate in the radio frequency portion of the electromagnetic spectrum where they [...]

John M. Grunsfeld – Science career

Grunsfeld’s academic positions include that of Visiting Scientist, University of Tokyo/Institute of Space and Astronautical Science (1980–81); Graduate Research Assistant, University of Chicago (1981–85); NASA Graduate Student Fellow, University of Chicago (1985–87); W.D. Grainger Postdoctoral Fellow in Experimental Physics, University of Chicago (1988–89); and Senior Research Fellow, California Institute of Technology (1989–92). Grunsfeld’s research has [...]

National Radio Astronomy Observatory – Locations

Charlottesville, Virginia NRAO headquarters is located on the University of Virginia grounds. The North American ALMA Science Center and the NRAO Technology Center are also located in Charlottesville. Green Bank, West Virginia NRAO is the operator of the world’s largest fully steerable radio telescope, the Green Bank Telescope, which stands near Green Bank, West Virginia. [...]

Astronomy – Observational astronomy

In astronomy, the main source of information about celestial bodies and other objects is the visible light or more generally electromagnetic radiation. Observational astronomy may be divided according to the observed region of the electromagnetic spectrum. Some parts of the spectrum can be observed from the Earth’s surface, while other parts are only observable from [...]

National Radio Astronomy Observatory – Introduction

National Radio Astronomy Observatory (NRAO) is a Federally Funded Research and Development Center of the United States National Science Foundation operated under cooperative agreement by Associated Universities, Inc for the purpose of radio astronomy. NRAO designs, builds, and operates its own high sensitivity radio telescopes for use by scientists around the world. Adapted from the [...]

Radio astronomy – Techniques

Radio astronomers use different techniques to observe objects in the radio spectrum. Instruments may simply be pointed at an energetic radio source to analyze its emission. To “image” a region of the sky in more detail, multiple overlapping scans can be recorded and piece together in a mosaic image. The type of instruments used depends [...]

Radio astronomy – Introduction

Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. The initial detection of radio waves from an astronomical object was made in the 1930s, when Karl Jansky observed radiation coming from the Milky Way. Subsequent observations have identified a number of different sources of radio emission. These include stars and [...]

Astrophysics – Observational astrophysics

The majority of astrophysical observations are made using the electromagnetic spectrum. * Radio astronomy studies radiation with a wavelength greater than a few millimeters. Radio waves are usually emitted by cold objects, including interstellar gas and dust clouds. The cosmic microwave background radiation is the redshifted light from the Big Bang. Pulsars were first detected [...]

Space science – Astronomy

Astronomical methods Astronomical methods are the equipment and techniques used to collect data about the objects in Space. Galileo’s first astronomical method was to find and buy the best telescope of the time and then point that telescope to the heavens. Methods can be categorized according to the wavelength they are attempting to record. Radio [...]









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