Sub-Orbital Space Flights & Satellite Exploration
Science@ESA (Episode 4): Following The Redshift (Part 1) – The Earliest Stars and Galaxies In The Universe. From HST (Hubble Space Telescope) to JWST (James Webb Space Telescope). In this fourth episode of the Science@ESA vodcast series Rebecca Barnes will identify some of the key discoveries achieved with the famous Hubble Space Telescope, look at the concept of redshift, and meet a new telescope that will be used to uncover the early Universe. — • www.youtube.com • www.youtube.com — ‘Redshift’ is a key concept for astronomers. The term can be understood literally – the wavelength of the light is stretched, so the light is seen as ‘shifted’ towards the red part of the spectrum. Something similar happens to sound waves when a source of sound moves relative to an observer. This effect is called the ‘Doppler effect’ after Christian Andreas Doppler, an Austrian mathematician who discovered that the frequency of sound waves changes if the source of sound and the observer are moving relative to each other. If the two are approaching, then the frequency heard by the observer is higher; if they move away from each other, the frequency heard is lower. There are many everyday examples of the Doppler effect – the changing pitch of police and ambulance sirens, or train whistles and racing car engines as they pass by. In every case, there is an audible change in pitch as the source approaches and then passes an observer. Everyone has heard the increased pitch of an approaching …
Tags: Astronomers, stars, science, red
Science@ESA Vodcast (Episode 3, Part 1): Exploring The Infrared Universe. In the Science@ESA series Rebecca Barnes will take you on a journey of discovery into the rapidly evolving field of space astronomy and planetary exploration. — • www.youtube.com • www.youtube.com • www.youtube.com — In this third episode of the Science@ESA vodcast series we investigate the infrared Universe, explore discoveries made by ground-breaking infrared space telescopes, and take a look at Herschel – esa’s pioneering infrared space telescope. Herschel, esa’s cutting-edge space observatory, will carry the largest, most powerful infrared telescope ever flown in space. A pioneering mission to study the origin and evolution of stars and galaxies, it will help understand how the Universe came to be what it is today. The first observatory to cover the entire range from far-infrared to sub-millimetre wavelengths and bridge the two, Herschel will explore further in the far-infrared than any previous mission, studying otherwise invisible dusty and cold regions of the cosmos, both near and far. Herschel will tap into unexploited wavelengths, seeing phenomena out of reach for other observatories, at a level of detail that has not been captured before. The telescope’s primary mirror is 3.5 m in diameter, more than four times larger than any previous infrared space telescope and almost one and a half times larger than that of the Hubble Space Telescope. The telescope will collect almost twenty times …
Tags: milky, Background, speed, infrared
Science@ESA Vodcast (Episode 3, Part 2): A New Generation Of Space Giants. — • www.youtube.com • www.youtube.com — In the Science@ESA series Rebecca Barnes will take you on a journey of discovery into the rapidly evolving field of space astronomy and planetary exploration. In this third episode of the Science@ESA vodcast series we investigate the infrared Universe, explore discoveries made by ground-breaking infrared space telescopes, and take a look at Herschel – esa’s pioneering infrared space telescope. Herschel, esa’s cutting-edge space observatory, will carry the largest, most powerful infrared telescope ever flown in space. A pioneering mission to study the origin and evolution of stars and galaxies, it will help understand how the Universe came to be what it is today. The first observatory to cover the entire range from far-infrared to sub-millimetre wavelengths and bridge the two, Herschel will explore further in the far-infrared than any previous mission, studying otherwise invisible dusty and cold regions of the cosmos, both near and far. Herschel will tap into unexploited wavelengths, seeing phenomena out of reach for other observatories, at a level of detail that has not been captured before. The telescope’s primary mirror is 3.5 m in diameter, more than four times larger than any previous infrared space telescope and almost one and a half times larger than that of the Hubble Space Telescope. The telescope will collect almost twenty times more light than …
Tags: generation, dark, universe, radiation
