Space surveillance is inherently challenging when compared to other tracking environments due to various reasons, not least of which is the long time gap between surveillance updates. Scientists propose a more statistically rigorous treatment of uncertainty in the near-Earth space environment than currently available.
Scientists have shown how gravitational waves might be 'seen' by looking at the stars. The new model proposes that a star that oscillates at the same frequency as a gravitational wave will absorb energy from that wave and brighten, an overlooked prediction of Einstein's 1916 theory of general relativity. The study contradicts previous assumptions about the behavior of gravitational waves.
Research to be published this Friday shows that massive galaxies in the universe have stopped making their own stars and are instead 'snacking' on nearby galaxies. Astronomers looked at more than 22,000 galaxies and found that while smaller galaxies are very efficient at creating stars from gas, the most massive galaxies are much less efficient at star formation, producing hardly any new stars themselves, and instead grow by eating other galaxies.
Miranda, a small, icy moon of Uranus, is one of the most visually striking and enigmatic bodies in the solar system. Despite its relatively small size, Miranda appears to have experienced an episode of intense resurfacing that resulted in the formation of at least three remarkable and unique surface features - polygonal-shaped regions called coronae.
For decades scientists have believed that galaxy mergers usually result in the formation of elliptical galaxies. Now, for the the first time, researchers have found direct evidence that merging galaxies can instead form disc galaxies, and that this outcome is in fact quite common.
New research explores cold dark matter in depth and proposes new answers about the formation of galaxies and the structure of the universe. These predictions are being contrasted with fresh data provided by the Hubble space telescope.
Rosetta's lander Philae will target Site J, an intriguing region on Comet 67P/Churyumov?Gerasimenko that offers unique scientific potential, with hints of activity nearby, and minimum risk to the lander compared to the other candidate sites.
Underscoring the vast differences between Earth and its neighbor Venus, new research shows a glimpse of giant holes in the electrically charged layer of the Venusian atmosphere, called the ionosphere. The observations point to a more complicated magnetic environment than previously thought - which in turn helps us better understand this neighboring, rocky planet.
New findings of how giant elliptical galaxies move have been discovered by an international team of astronomers using the newly installed Multi Unit Spectroscopic Explorer (MUSE) at the European Southern Observatory?s (ESO) Very Large Telescope (VLT) facility.
Astronomers searching the atmospheres of alien worlds for gases that might be produced by life can't rely on the detection of just one type, such as oxygen, ozone, or methane, because in some cases these gases can be produced non-biologically, according to extensive simulations by researchers in the NASA Astrobiology Institute's Virtual Planetary Laboratory.
Astronomers have found evidence of a hot binary companion star to a yellow supergiant star, which had become a bright supernova. Its existence had been predicted by the team. This finding provides the last link in a chain of observations that have so far supported the team's theoretical picture for this supernova.