Discovery of pulsars
British astronomer Dame Jocelyn Bell Burnell was the first person to discover a pulsar in 1967 when she discovered a radio pulsar.
Since then, other types of pulsars that emit X-rays and gamma rays have also been discovered.
Pulsars are essentially rotating, highly enlarged neutron stars, but when they were first discovered they were believed to have come from extraterrestrials.
‘Impressive!’ Radio signal
In 1977, an astronomer searching for extraterrestrial life in the nearby sky over Ohio discovered a powerful radio signal that was so strong that he excitedly wrote, “Wow!”
In 1977, an astronomer searching for extraterrestrial life in the nearby sky over Ohio discovered a powerful radio signal that was so strong that he excitedly wrote, “Wow!” next to his data
The 72-second explosion that Dr. Jerry Ehman discovered through a radio telescope came from Schütze, but did not correspond to any known celestial object.
Conspiracy theorists have since claimed that the ‘Wow! The signal, which was 30 times stronger than the background radiation, was a message from intelligent aliens.
Fossilized Martian microbes
In 1996, NASA and the White House made the explosive announcement that the stone contained traces of Mars bugs.
Cataloged as Allen Hills (ALH) 84001, the meteorite crashed onto the frozen debris of Antarctica 13,000 years ago and was recovered in 1984.
Photographs were published showing elongated segmented objects that looked strikingly lifelike.
Photographs have been published showing elongated segmented objects that appear strikingly lifelike (image)
The excitement didn’t last long, however. Other scientists asked if the meteorite samples were contaminated.
They also argued that heat generated when the rock was blasted into space may have created mineral structures that could be mistaken for microfossils.
Behavior of Tabby’s Star in 2005
The star, also known as KIC 8462852, is 1,400 light years away and has stunned astronomers since its discovery in 2015.
It darkens much faster than other stars, which some experts have viewed as a sign that aliens are using a star’s energy.
The star, also known as KIC 8462852, is 1,400 light years away and has baffled astronomers since its discovery in 2015 (artistic impression)
Recent studies have “ruled out the possibility of an alien megastructure,” suggesting instead that a ring of dust could be causing the strange signals.
Exoplanets in the Goldilocks Zone in 2015
In February of this year, astronomers announced that they had discovered a star system with planets that could support life just 39 light years away.
Seven Earth-like planets have been discovered orbiting the nearby dwarf star ‘Trappist-1’ and all of them could have water on their surface, one of the key components of life.
Three of the planets are in such good condition that scientists say life has already evolved on them.
The researchers claim that within a decade they will know whether or not there is life on any of the planets, saying, “This is just the beginning.”