Could aliens visit Earth? Here are some challenges

Scientists say it’s unlikely aliens visit Earth anytime soon, because interstellar travel faces huge barriers of distance, energy and time.

The 1919 solar eclipse that proved Einstein right

During a May 29, 1919, solar eclipse, astronomers saw the sun bend starlight, proving Einstein's general relativity and catapulting him to rock star fame.

Do Europa’s water vapor plumes not exist after all?

New observations from the Hubble Space Telescope suggest that Europa's water vapor plumes are less likely than previously thought. But they don't rule them out.

Moon base update! NASA unveils next steps

NASA has unveiled exciting new plans for its moon base, including timelines and details of hopping drones, landers and vehicles.

Hot Jupiter exoplanet has cloudy mornings and clear evenings

New observations with the Webb space telescope of the hot Jupiter exoplanet WASP-94A b show that sandy clouds fill the morning skies, but dissipate by evening.

Ice volcanoes on Ganymede? New promising candidates found

Are there ice volcanoes on Ganymede? A new international study reveals several good candidates on Jupiter's large ocean moon.

Searching for Earth-sized exoplanets with the POET mission

In 2029, Canada's POET mission will start searching for Earth-sized exoplanets as well as super-Earths. It will focus on smaller, cooler stars like red dwarfs.

Interstellar turbulence in the Milky Way distorts light

For the 1st time, astronomers have directly detected how interstellar turbulence distorts the light from distant objects in our galaxy.

Stardust in Antarctica shows Earth crossed a supernova cloud

Stardust in Antarctica reveals the presence of an element that is not naturally made on Earth. But it is created in supernovas. Read more about the evidence.

Baily’s beads seen during a solar eclipse today in 1836

May 15, 1836: Francis Baily, an English astronomer, saw light shining through lunar ridges during an eclipse of the sun. These are now known as Baily's beads.

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