Astronomy

articles 1 to 20 of 203

The discovery of Kepler-452b raises questions that go to the heart of religion. NASA/AAP/ Artist's impression of Kepler-452b.

Heavens above: what Earth 2.0’s discovery means for God

Kepler-452b's discovery last week has raised the perennial question: are we alone in the universe? While the find's scientific import is huge, it also poses questions that go to the heart of religion.
Breaking down the colours in the star light can reveal more about what you are looking at. Flickr/Indigo Skies Photography

Explainer: seeing the universe through spectroscopic eyes

Astronomers can tell a whole lot more about a star or a galaxy if they break up the visible light in a rainbow of colours.
What could be out there? That question eventually led to the discovery of Pluto. ESO/L. Calçada

Finding Pluto: the hunt for Planet X

The existence of a "Planet X" in the outer solar system was the subject of great speculation, and was finally settled with the discovery of Pluto in 1930.
This amazing photo even shows the four Galilean moons around Jupiter: Io, Europa, Ganymede, and Callisto. Kevin Baird/Flickr

Jupiter and Venus brush cheeks in the night sky

Look up tonight and you'll see a stunning conjunction of the two brightest planets in the night sky.
Understanding how galaxies are arranged could be the key to figuring what causes the expansion of the universe. ESA/Hubble, NASA and S. Smartt (Queen's University Belfast)

Galaxy survey to probe why the universe is accelerating

A unique map of the galaxies in the sky could shed light on the mysteries of the universe – including dark energy and dark matter.
Scientists knew the mystery signals were close by the Parkes radio telescope: but what was the source? Flickr/Amanda Slater

How we found the source of the mystery signals at The Dish

Astronomers used to probing the universe always knew that strange signals detected by the Parkes radio telescope were coming from somewhere closer to home. But finding the source was the tricky bit.
How do we think about something we can’t see and don’t experience in our everyday lives, but seems to be pushing our universe apart ever faster? NASA, ESA, G. Illingworth, D. Magee, and P. Oesch (University of California, Santa Cruz), R. Bouwens (Leiden University), and the HUDF09 Team

Explainer: the mysterious dark energy that speeds the universe’s rate of expansion

Einstein's theory of gravity says dark energy must be out there, accelerating the expansion of our universe. But what is it and how can we try to figure out more about it?

Top contributors

More