Indeed, some at the meeting argued that if aliens were to use an astronomical phenomenon called gravitational lensing (in which the gravitational field of the sun bends and amplifies radio waves and light from Earth), human signals could be amplified to the point where even the light from cities would be visible.
ECONOMIST: An argument over whether to send messages to aliens
The blog posts and photos afford readers a glimpse of life on the massive orbiting outpost, and by shining a light on Earth from space, Garan and his colleagues hope to mobilize people to improve the conditions on our fragile planet.
It is located in the Milky Way galaxy, about 335 light years from Earth.
Measuring the upward flux of light from the earth is not a new idea.
The system, which right now is designated Kepler-47, is located about 4, 900 light years from Earth.
FORBES: NASA Finds Multiple Planets Circling Binary Star System
This provides us with the first real image of a planet situated 25 light years from Earth.
At a distance of more than 20 light years from Earth, Gliese 581c is not exactly on the doorstep.
The solar system the team discovered is about 10, 000 light years from Earth.
FORBES: Astronomers Discover A Solar System Similar To Our Own
It is located about 335 light years from Earth, within the Milky Way.
The first, called Kepler-34b, orbits its two small stars in a solar system about 4, 900 light years from Earth.
With the additional data that the satellites provide, researchers hope finally to shed light on the Earth's complicated carbon cycle.
ECONOMIST: Two new satellites will monitor carbon-dioxide emissions
It is 128 light years from Earth, and is just visible to the naked eye in the constellation of Pegasus.
With satellites providing data from thousands of additional locations, researchers hope finally to shed light on the Earth's complicated carbon cycle.
ECONOMIST: Two new satellites will monitor carbon dioxide emissions
They did this by taking a peek at an astronomers' catalogue of 318 active galaxies located within 300m light years of Earth.
Dr. Freire and his colleagues put Einstein to the test in a cosmic laboratory 7, 000 light years from earth, where two exotic stars are circling each other.
Located 168 light years from Earth orbiting the star Kappa Andromedae, this planet is about 12.8 times more massive than Jupiter, the largest planet in our solar system.
FORBES: Astronomers Locate Massive 'Super-Jupiter' Around Giant Star
The first batch of these -- literally historic -- images shows us a tantalizing look at the Fornax cluster of galaxies, some 60 million light years from Earth.
ENGADGET: DECam: Gazing deep into the final frontier in search of dark energy
Although quasars are light days across, they are billions of light years from Earth, which means that most of what scientists know about them comes from extrapolations and not direct evidence.
FORBES: Hubble Telescope Observes Matter Falling Into Black Hole
Astronomers using the Hubble Space Telescope have discovered a supernova in the distant galaxy NGC 5806, which is a relatively unremarkable galaxy located about 80 million light years from Earth.
Another is that they have been confirmed time and again by tests that range from minute measurements of bodies circling the solar system to observations of the farthest known light sources, quasars, billions of light years from Earth.
It also suggests the amount of aerosols that humans emit into the atmosphere could impact tree growth, as high levels of aerosols cause "global dimming", an effect that occurs when the levels of light reaching the Earth's surface fall.
While the ozone layer in the upper atmosphere plays an important role in limiting harmful ultraviolet light reaching the Earth's surface, low-level ozone is a pollutant that is harmful, causing respiratory problems in animals as well as well-documented cases in humans.
This will enable it to detect planets as tiny as four earth masses up to 33 light-years away, and earth-sized planets (if they exist) around the sun's closest neighbours.
They orbit the Kepler-62 star in the Constellation Lyra - 1, 200 light-years from Earth.
On its route to earth, light from some quasars passed through a cloud of gas.
The first, called Kepler-34b, orbits its two small stars in a system about 4, 900 light-years from Earth.
For example, astronomers recently discovered a galaxy that is over 13 billion light years away from Earth.
FORBES: Why Marco Rubio Needs To Know That The Earth Is Billions Of Years Old
This supermassive black hole lies at the center of galaxy NGC 1277, which is about 220 million light years away from Earth.
FORBES: Astronomers Find One Of The Biggest Supermassive Black Holes Yet
It's only 20 light-years from Earth -- a lot closer than the newly discovered planets, though there has been some controversy about its existence.
应用推荐