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Tag: Hubble

Mother of the Hubble: Tributes paid to Nasa scientist

Mother of the Hubble: Tributes paid to Nasa scientist

Science
Tributes are being paid to Dr Nancy Grace Roman, the first woman to hold an executive position at the US space agency Nasa. Dr Roman was known as "Mother of the Hubble" for her work on the early stages of the Hubble Space Telescope. Nasa said her most important legacy was the advancement of women in the sciences and the generations of young scientists she inspired. She died in Maryland on Wednesday at the age of 93. Stars' tears over space-race drama How black women first started working for Nasa Dr Roman was fascinated by the clear night skies of her childhood home in Nevada from a very early age. She joined an astronomy club when she was just 11 and her passion for stargazing continued throughout her life. But the young Dr R...
Hubble image offers holiday 'wreath' in the sky

Hubble image offers holiday 'wreath' in the sky

Science
Dec. 24 (UPI) -- NASA's latest image release from the Hubble Space Telescope offers something fit for the times -- a celestial wreath. The space agency on Friday shared a fresh image of RS Puppis, the sun at the center of the image, surrounded by reflective dust that has been lit up by one of the brightest stars in the Milky Way. RS Puppis is known as a Cepheid variable star, which rhythmically brightens and dims during a six-week cycle with an average 15,000 more brightness than the Sun. The star is also ten times the size of the Sun and 200 times bigger. The series of photos from the Hubble leading to the newly released image captures light flashes seen across the nebula. "Hubble took a series of photos of light flashes rippling across the nebula in a phenomenon known as a 'light echo,'...
Faint light in Hubble image helps astronomers map dark matter

Faint light in Hubble image helps astronomers map dark matter

Science
Dec. 20 (UPI) -- Scientists have yet to directly detect dark matter, and they don't know what dark matter actually is. But dark matter's presence and influence is reflected in the patterns and movement of light. Using data collected by NASA/ESA Hubble Space Telescope, astronomers have developed a new way to "see" dark matter via distant starlight. "We have found that very faint light in galaxy clusters, the intracluster light, maps how dark matter is distributed," Mireia Montes, researcher at the University of New South Wales, said in a news release. Intracluster light is the light produced by stars ripped from their homes by the gravity of nearby galaxies. According to Montes and her colleagues, once freed from the gravity of their home galaxy, the roaming stars congregate near concentra...
Hubble snaps photos as Mars makes its closest approach to Earth

Hubble snaps photos as Mars makes its closest approach to Earth

Science
July 27 (UPI) -- Mars is the closest its been to Earth in 15 years, offering the Hubble Space Telescope especially clear views of the Red Planet. To celebrate the close approach, NASA and Hubble shared several new images of Mars and Saturn, which is also making its closest approach. When Earth, Mars and Saturn are in alignment, they're said to be in opposition. Mars is currently 36.9 million miles from Earth. "We're always looking for excuses to share Hubble's images," Bonnie Meinke, astronomer with the Space Telescope Science Institute, told UPI. "But we can also use these images and observations for scientific purposes." The high resolution images offer scientists another opportunity to gauge the scope of the dust storm currently swirling on Mars. "We have all of these spacecraft on or...
Hubble, Gaia produce most precise measure of universe's expansion rate

Hubble, Gaia produce most precise measure of universe's expansion rate

Science
July 12 (UPI) -- By combining the observations of the two most powerful space telescopes in orbit, scientists have achieved the most precise measurement of the Hubble constant, the universe's expansion rate. The new measurement confirms the tension between explosion rate in the early and late universe, researchers report. Astronomers can measure the expansion of the universe by measuring a galaxy's redshift, a change in the wavelength of the light due to a change in the velocity of the object. By measuring the redshift of galaxies using the Hubble Telescope, scientists have established the Hubble constant. But investigations of the cosmic microwave background, the oldest radiation in the universe, can also be used to predict the universe's expansion rate. Maps of the microwave signature ...