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|Astronomy News -- ScienceDaily|
Updated : Tue, 23 Apr 2019 18:37:54 EDT
Hubble celebrates its 29th birthday with unrivaled view of the Southern Crab Nebula
This incredible image of the hourglass-shaped Southern Crab Nebula was taken to mark the NASA/ESA Hubble Space Telescope's 29th anniversary in space. The nebula, created by a binary star system, is one of the many objects that Hubble has demystified throughout its productive life. This new image adds to our understanding of the nebula and demonstrates the telescope's continued capabilities.
Publ.Date : Thu, 18 Apr 2019 13:14:19 EDT
Mercury has a solid inner core: New evidence
Scientists have long known that Earth and Mercury have metallic cores. Like Earth, Mercury's outer core is composed of liquid metal, but there have only been hints that Mercury's innermost core is solid. Now, in a new study, scientists report evidence that Mercury's inner core is indeed solid and that it is very nearly the same size as Earth's solid inner core.
Publ.Date : Wed, 17 Apr 2019 13:00:07 EDT
Explosion on Jupiter-sized star 10 times more powerful than ever seen on our Sun
A stellar flare 10 times more powerful than anything seen on our Sun has burst from an ultracool star almost the same size as Jupiter.
Publ.Date : Wed, 17 Apr 2019 12:00:41 EDT
Powerful particles and tugging tides may affect extraterrestrial life
Two new studies, one on high-energy particles and the other on tidal forces, may bring into question the habitability of TRAPPIST-1 exoplanets.
Publ.Date : Wed, 17 Apr 2019 10:28:40 EDT
Five planets revealed after 20 years of observation
To confirm the presence of a planet, it is necessary to wait until it has made one or more revolutions around its star. This can take from a few days for the closest to the star to decades for the furthest away. Only a telescope dedicated to the search for exoplanets can carry out such measurements over such long periods of time, which is the case of the EULER telescope of UNIGE.
Publ.Date : Wed, 17 Apr 2019 10:27:47 EDT
How to defend the Earth from asteroids
The Chelyabinsk meteor caused extensive ground damage and numerous injuries when it exploded on impact with Earth's atmosphere in 2013; to prevent another such impact, scientists plan to use a simple yet ingenious way to spot tiny near-Earth objects.
Publ.Date : Wed, 17 Apr 2019 08:46:07 EDT
NASA's Cassini reveals surprises with Titan's lakes
On its final flyby of Saturn's largest moon in 2017, NASA's Cassini spacecraft gathered radar data revealing that the small liquid lakes in Titan's northern hemisphere are surprisingly deep, perched atop hills and filled with methane.
Publ.Date : Tue, 16 Apr 2019 14:35:50 EDT
CubeSats prove their worth for scientific missions
Only a few years ago, the astronomy and heliophysics communities were skeptical about whether CubeSats could reliably obtain scientific data. But these breadloaf-size satellites have proven their ability to return useful data.
Publ.Date : Tue, 16 Apr 2019 13:21:37 EDT
Astronomers discover third planet in the Kepler-47 circumbinary system
Astronomers have discovered a third planet in the Kepler-47 system, securing the system's title as the most interesting of the binary-star worlds. Using data from NASA's Kepler space telescope, a team of researchers detected the new Neptune-to-Saturn-size planet orbiting between two previously known planets.
Publ.Date : Tue, 16 Apr 2019 09:37:53 EDT
Astronomers take first, high-resolution look at huge star-forming region of Milky Way
A team of astronomers used a newly commissioned radio telescope in South Korea to make the first high-resolution observations of the molecular clouds within a star-forming region of the Milky Way. The first good look at the galactic region indicated large molecular clouds about 180 light years across with a mass equal to about 100,000 masses of our sun.
Publ.Date : Mon, 15 Apr 2019 12:23:21 EDT
Meteoroid strikes eject precious water from moon
Streams of meteoroids striking the Moon infuse the thin lunar atmosphere with a short-lived water vapor, according to researchers using data from NASA's LADEE spacecraft. The findings will help scientists understand the history of lunar water.
Publ.Date : Mon, 15 Apr 2019 12:23:15 EDT
TESS finds its first Earth-sized planet
A nearby system hosts the first Earth-sized planet discovered by NASA's Transiting Exoplanets Survey Satellite, as well as a warm sub-Neptune-sized world. This milestone sets the path for finding smaller planets around even smaller stars, and those planets may potentially be habitable.
Publ.Date : Mon, 15 Apr 2019 12:23:09 EDT
Tiny fragment of a comet found inside a meteorite
Astronomers have made a surprising discovery that gives clues to how solar system formed.
Publ.Date : Mon, 15 Apr 2019 11:38:28 EDT
Asteroids help scientists to measure the diameters of faraway stars
Using the unique capabilities of telescopes specialized on cosmic gamma rays, scientists have measured the smallest apparent size of a star on the night sky to date. The measurements reveal the diameters of a giant star 2,674 light-years away and of a sun-like star at a distance of 700 light-years.
Publ.Date : Mon, 15 Apr 2019 11:38:25 EDT
Travel through wormholes is possible, but slow
A physicist has shown that wormholes can exist: tunnels in curved space-time, connecting two distant places, through which travel is possible. But don't pack your bags for a trip to other side of the galaxy yet; although it's theoretically possible, it's not useful for humans to travel through, said the author of the study.
Publ.Date : Mon, 15 Apr 2019 09:08:53 EDT
Hubble peers at cosmic blue bauble
Messier 3: containing an incredible half-million stars, this 8-billion-year-old cosmic bauble is one of the largest and brightest globular clusters ever discovered.
Publ.Date : Fri, 12 Apr 2019 11:03:36 EDT
NASA's landmark Twins Study reveals resilience of human body in space
Newly published research reveals some interesting, surprising and reassuring data about how one human body adapted to -- and recovered from -- the extreme environment of space.
Publ.Date : Thu, 11 Apr 2019 16:51:13 EDT
Formation of a magnetar 6.5 billion light years away
Building on recent discoveries about neutron stars, a team of astronomers has identified X-ray observations that are consistent with the merger of two neutron stars. This merger is believed to have formed a magnetar, which is a neutron star with an extremely powerful magnetic field.
Publ.Date : Thu, 11 Apr 2019 11:52:50 EDT
Working together as a 'virtual telescope,' observatories around the world produce first direct images of a black hole
An international team of over 200 astronomers has captured the first direct images of a black hole. They accomplished this remarkable feat by coordinating the power of eight major radio observatories on four continents, to work together as a virtual, Earth-sized telescope.
Publ.Date : Wed, 10 Apr 2019 09:10:28 EDT
New model accurately predicts harmful space weather
A new, first-of-its-kind space weather model reliably predicts space storms of high-energy particles that are harmful to many satellites and spacecraft orbiting in the Earth's outer radiation belt.
Publ.Date : Tue, 09 Apr 2019 16:28:09 EDT