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Scientists have estimated the first cosmic census of planets in our galaxy and the numbers are astronomical: at least 50 billion planets in the ...

Scientists have discovered the first planet from another galaxy, sort of. While some 500 planets have been identified in other parts of our galaxy — the Milky Way— none has been reported in other galaxies.

Scientists discovered two bubbles of energy erupting from the center of the Milky Way galaxy.

A huge ball of brightly burning gas drifting through a neighboring galaxy may be the heaviest star ever discovered - hundreds of times more massive than the sun, scientists said Wednesday after working out its weight for the first time.

Astronomers have underestimated the number of galaxies in parts of the Universe by as much as 90 per cent, according to a study, suggesting billions of stars are yet to be recorded.

Astronomers announced this week they found a water-rich and relatively nearby planet that's similar in size to Earth.