Tag archives: observatory
By Michael Banks
Here is an example of how to condense four years’ worth of space observations into just a minute.
The animation above, which was created by Pedro Gómez-Alvarez of the European Space Agency (ESA), shows a timeline of more than 37,000 scientific observations made by ESA’s Herschel Space Observatory.
The video runs from Herschel’s launch on 14 May 2009 until the infrared observatory made its last observation on 29 April 2013 as the craft’s detectors ran out of coolant.
Herschel – a far-infrared and submillimetre telescope – had two main goals: to study star formation in our galaxy; and galaxy formation across the universe.
Named after the German-born astronomer who in 1781 discovered Uranus, the probe carried a 3.5 m-diameter mirror – the largest to be deployed in space – and investigated light with wavelengths of 55–670 µm.
The craft was placed in an area of space some 1.5 million kilometres further out from the Sun beyond the Earth. Known as Lagrange point L2, it is where a space probe can usefully hover, little disturbed by stray signals from home and without having to use much fuel to keep it in position.
You can find some of the incredible images taken by Herschel at ESA’s multimedia gallery.
By Tushna Commissariat
I have already raved on about the awesomeness of the Hubble Space Telescope in my blog entry about its 21st anniversary in April this year. Now, the telescope has crossed yet another milestone – on Monday 4 July the Earth-orbiting observatory logged its one-millionth science observation! The image above is a composite of all the various celestial objects ranging through stars, clusters, galaxies, nebulae, planets, etc that Hubble has catalogued over the years. Click on the image for a hi-res version. [Credit: NASA, ESA and R Thompson (CSC/STScI)]
The telescope has had a significant impact on all fields of science from planetary science to cosmology and has provided generations with breathtaking images of our universe ever since it was launched on 24 April 1990 aboard Discovery’s STS-31 mission.
Hubble’s counter reading includes every observation of astronomical targets since its launch. The millionth observation made by Hubble was during a search for water in the atmosphere of an exoplanet almost 1000 light-years away from us. The telescope had trained its Wide Field Camera 3, a visible and infrared light imager with an on-board spectrometer on the planet HAT-P-7b, a gas giant planet larger than Jupiter orbiting a star hotter than our Sun. HAT-P-7b has also been studied by NASA’s Kepler telescope after it was discovered by ground-based observations. Hubble now is being used to analyse the chemical composition of the planet’s atmosphere.
“For 21 years Hubble has been the premier space-science observatory, astounding us with deeply beautiful imagery and enabling ground-breaking science across a wide spectrum of astronomical disciplines,” said NASA administrator Charles Bolden. He piloted the space shuttle mission that carried Hubble to orbit. “The fact that Hubble met this milestone while studying a far away planet is a remarkable reminder of its strength and legacy.”
Hubble has now collected more than 50 terabytes – the archive of that data is available to scientists and the public at http://hla.stsci.edu/
The NASA video below was created last year for the 20th Hubble anniversary celebration and tells you how you could send a message to Hubble that will be stored in its archive.