NASA: Seven Earth-like planets orbit the same star 39 light-years away.

NASA held a press conference on the 22nd to announce the major discoveries of exoplanet exploration.
astronomers have found that seven Earth-like planets orbit a dwarf star called Trappist-1 in a universe only 39 light-years from Earth, all of which may have water on their surfaces that is necessary to sustain life.
three of the planets are particularly well-suited, and scientists say there may have been life evolving.
may have rocky material on these planets, similar in size to Earth, with six of the planets have surface temperatures between 0 and 100 degrees Celsius.
this provides the necessary atmospheric conditions for the growth of organisms.
, humans have not found a system of objects containing so many Earth-sized planets.
say they will know within a decade whether life exists on the planets, adding that "this is just the beginning."
Trappist-1 is a dwarf star with seven Earth-sized planets orbiting it.
, the outerst 1h star is very cold, while the closest 1b and 1c and 1d planets to the star are likely to be dry and hot.
although scientists say all seven planets may have surface water, planets 1e, 1f and 1g are most likely to have oceans.
image is an imaginary composition of a planet in a newly discovered astros system.
including their transit cycles, distance from stars, mass and radius compared to Earth.
the second half shows data from Mercury, Venus, Earth and Mars.
the orbits of these planets are much shorter than those of Mercury, Venus, Earth and Mars and the sun.
Trappist-1 galaxy is located in the Milky Way with Earth, 39 light-years from Earth, and is arguably a close neighbor to the Milky Way galaxy with a diameter of 100,000 light-years.
, experts say it could take thousands of years for humans to reach the galaxy using existing technology.
of the Trappist-1 cerial system.
seven planets, named alphabetically from 1b to 1h, may always face the main star on the same side, a condition known as tidal locking, or captured swiring.
caused temperature gradients on the planet's surface, meaning that water could be present on the planet's surface under appropriate atmospheric conditions.
say Planet 1f is the most likely to breed extraterrestary.
it is similar in size to earth and has a suitable temperature.
that it receives only a little less energy from the main star than earth receives from the sun, and is slightly colder than Earth.
, however, because they always run around the main star on the same side, there may be eternal night on one side and eternal night on the other.
may be hotter on the side of the main star, balancing the slightly cooler temperatures of the planet than Earth.
(above is a conceptual map of the 1f planets most likely to have life) which were discovered by telescopes using the "Ling-Sun method".
when planets orbit in front of stars, the light weakens, and their orbits and other features are measured.
the Nasa Spitzer Telescope monitoring data from new galaxies over a three-week 1990.
white dot represents a reading from the telescope, and the vertical line indicates a decrease in the density of time between planetary days.
between the two times the light is significantly weaker indicates the orbital length of the planet.
only 1.5 days from the closest planet to the main star.
telescope used by scientists on the Spanish island of La Palma.
scientists say we had only one idea for extraterrestary, but now we have a goal.
the presence of life leaves unique chemical markers in the atmosphere, which may be found through large telescopes.
nasa's newly discovered image of the planet's surface, which could give birth to life.
Trappist-1 is only one-tenth the diameter of the sun, and the light is dimr, 80 times the mass of Jupiter.
scientists say our technology is far from enough to launch a probe into the galaxy, and it's unclear whether humans will be able to endure long-term space travel.
although they are close to Earth, interstellar travel is still very far away.
nasa's newly discovered image of the planet's surface, which could give birth to life.
Ignas Snellen, a professor of astronomy from Finland, is optimistic about the potential for life in this astronomy system.
, she wrote in the journal Nature that in billions of years, the sun will burn out and the solar system will cease to exist, but Trappist-1 is still in infercession.
it burns hydrogen very slowly, and it will last another 10 trillion years, 700 times the time our universe has been around for so long that the astros have been able to evolve life.
source: MailOnline.