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Pluto’s ghoulish cousin, 2015 TG387, lurks in the distant reaches of our own Solar System. Illustration by Roberto Molar Candanosa and Scott Sheppard, courtesy of Carnegie Institution for Science.

A Goblin could guide us to a mystery planet thought to exist in the Solar system

Whether you call it Planet X or Planet Nine, talk of another planet lurking in our Solar system won't go away. So what does the discovery of a new object – nicknamed "The Goblin" – add to the debate?
Captured: approximately 15,000 galaxies (12,000 of which are star-forming) widely distributed in time and space. NASA, ESA, P. Oesch (University of Geneva), and M. Montes (University of New South Wales)

Game-changing resolution: whose name on the laws of physics for an expanding universe?

Astronomers are voting to rename one of the laws of physics. The voting may have far-reaching effects leading to renaming of other laws and giving 'forgotten' scientists due credit.
The other galaxies are there, but they are hiding a very long way away. www.shutterstock.com

Curious Kids: Where are all the other galaxies hidden?

We are in the Milky Way. If you travelled on an extremely fast spaceship for more than two million years, you would reach our neighbour, the Andromeda galaxy. All other galaxies are even further away.
The Blood Moon from January 31, 2018. Our second chance to see an eclipsed Moon this year is coming up on July 28. Martin George

It’s a busy night sky this July, so make sure you look up

All five five planets visible to the naked-eye are on show in the night skies over Australia, and a Blood Moon on the way too.
US F/A-18 footage of a UFO (circled in red). Creative Commons Attribution-Share Alike 4.0 International license. Parzival191919

Are we alone? The question is worthy of serious scientific study

About 5 percent of all UFO sightings cannot be easily explained by weather or human technology. A physicist argues that there's compelling evidence to justify serious scientific study and that the skeptics should step aside – for the sake of humanity.

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