Clyde Space CubeSat: Scotland's 1st Spacecraft Is Tiny Satellite

An artist's illustration of UKube-1, Scotland's first satellite, in orbit. It launches in 2013. 

CREDIT: Clyde Space

cotland's first satellite will soon find a home in orbit around the Earth — a forerunner of things to come under a collaborative, national nanosatellite program in the UK.

Dubbed UKube-1, the small, novel CubeSat spacecraft has been constructed by Clyde Space in Glasgow and is completing final testing for launch later this year onboard a Russian Soyuz-2 rocket from the Baikonur Cosmodrome in Kazakhstan.

The advanced UKube-1 nanosatellite has been designed and manufactured by Clyde Space at their high-tech facility at the West of Scotland Science Park.

The petite but powerful spacecraft is chock full of payloads that include the first GPS device aimed at measuring space weather in Earth's plasmasphere — the inner-most layer of the planet's magnetosphere.

The satellite also comes equipped with a camera that will take pictures of the Earth from space and test the effect of radiation on space hardware using a new generation of imaging sensor and an experiment to demonstrate the feasibility of using cosmic radiation to improve the security of communications satellites and to flight test lower cost electronic systems.

The UKube-1 satellite also totes a payload made up of five experiments that UK students and the public can interact with — a true "outreach" program into space.


A recent visitor to take a look at UKube-1 was Alex Salmond, First Minister of Scotland.

"It's one small satellite for Clyde and a giant leap for their extraterrestrial export business and a new hope for space science in Scotland," Salmond said.

UKube-1 is a UK Space Agency mission. The mission has been funded jointly by Clyde Space and a number of funding partners including the UK Space Agency, the Science and Technology Facilities Council, the Technology Strategy Board and Scottish Enterprise.

As well as the platform and payload elements of the mission, UKube-1 is being supported by three UK ground stations.

"We started designing our nanosatellite platform in 2008 as a means to stimulate some funding from the UK government as part of a national CubeSat program," Craig Clark, chief executive officer of Clyde Space said. Nanosatellites are the fasting growing space sub-sector, with the UK able to tap into both heritage and expertise that primes the pump in building future small satellites, Clark added.

Clark said that there are a number of new developments from Clyde Space on the mission including deployable solar panels — there are three on UKube-1 — as well as advanced attitude and control technology, a sophisticated miniature sun sensor and specialized software that other CubeSats can use.

NASA Kepler Mission Discovers Tiny Planet System

The line up compares artist's concepts of the planets in the Kepler-37 system to the moon and planets in the solar system. 

The smallest planet, Kepler-37b, is slightly larger than our moon, measuring about one-third the size of Earth. Kepler-37c, the second planet, is slightly smaller than Venus, measuring almost three-quarters the size of Earth. 

Kepler-37d, the third planet, is twice the size of Earth. Click image for full caption and larger size. Image credit: NASA/Ames/JPL-Caltech

NASA's Kepler mission scientists have discovered a new planetary system that is home to the smallest planet yet found around a star similar to our sun.

The planets are located in a system called Kepler-37, about 210 light-years from Earth in the constellation Lyra. The smallest planet, Kepler-37b, is slightly larger than our moon, measuring about one-third the size of Earth. It is smaller than Mercury, which made its detection a challenge.

The moon-size planet and its two companion planets were found by scientists with NASA's Kepler mission to find Earth-sized planets in or near the "habitable zone," the region in a planetary system where liquid water might exist on the surface of an orbiting planet. However, while the star in Kepler-37 may be similar to our sun, the system appears quite unlike the solar system in which we live.

Astronomers think Kepler-37b does not have an atmosphere and cannot support life as we know it. The tiny planet almost certainly is rocky in composition. Kepler-37c, the closer neighboring planet, is slightly smaller than Venus, measuring almost three-quarters the size of Earth. Kepler-37d, the farther planet, is twice the size of Earth.

The first exoplanets found to orbit a normal star were giants. As technologies have advanced, smaller and smaller planets have been found, and Kepler has shown even Earth-size exoplanets are common.

"Even Kepler can only detect such a tiny world around the brightest stars it observes," said Jack Lissauer, a planetary scientist at NASA's Ames Research Center in Moffett Field, Calif. "The fact we've discovered tiny Kepler-37b suggests such little planets are common, and more planetary wonders await as we continue to gather and analyze additional data."

Kepler-37's host star belongs to the same class as our sun, although it is slightly cooler and smaller. All three planets orbit the star at less than the distance Mercury is to the sun, suggesting they are very hot, inhospitable worlds.

Kepler-37b orbits every 13 days at less than one-third Mercury's distance from the sun. The estimated surface temperature of this smoldering planet, at more than 800 degrees Fahrenheit (700 degrees Kelvin), would be hot enough to melt the zinc in a penny. Kepler-37c and Kepler-37d, orbit every 21 days and 40 days, respectively.

"We uncovered a planet smaller than any in our solar system orbiting one of the few stars that is both bright and quiet, where signal detection was possible," said Thomas Barclay, Kepler scientist at the Bay Area Environmental Research Institute in Sonoma, Calif., and lead author of the new study published in the journal Nature.

"This discovery shows close-in planets can be smaller, as well as much larger, than planets orbiting our sun."

The research team used data from NASA's Kepler space telescope, which simultaneously and continuously measures the brightness of more than 150,000 stars every 30 minutes.

When a planet candidate transits, or passes, in front of the star from the spacecraft's vantage point, a percentage of light from the star is blocked.

This causes a dip in the brightness of the starlight that reveals the transiting planet's size relative to its star.

The size of the star must be known in order to measure the planet's size accurately. To learn more about the properties of the star Kepler-37, scientists examined sound waves generated by the boiling motion beneath the surface of the star.

They probed the interior structure of Kepler-37's star just as geologists use seismic waves generated by earthquakes to probe the interior structure of Earth. The science is called astero-seismology.

The sound waves travel into the star and bring information back up to the surface. The waves cause oscillations that Kepler observes as a rapid flickering of the star's brightness.

Like bells in a steeple, small stars ring at high tones while larger stars boom in lower tones. The barely discernible, high-frequency oscillations in the brightness of small stars are the most difficult to measure.

This is why most objects previously subjected to astero-seismic analysis are larger than the sun.

Subaru Telescope Spots Tiny Companion Planet To Sun-Like Star

This August 2009 discovery image of GJ 758 B was taken with the Subaru Telescope's HiCIAO instrument in the near infrared, which measures and records differences in heat.


Without the special technique employed here (angular differential imaging), the star's glare would overwhelm the light from the planet candidates.


The planet-like object, GJ 758 B, is circled as B in the lower right portion of the image. An unconfirmed companion planet or planet-like object, C, can be viewed above B.


The star, GJ 758, is located at the center of the image, at the hub of the starburst. The graphic at the top compares the orbital distances of solar system planets. Credit: Max Planck Institute for Astronomy/National Astronomical Observatory of Japan