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Space

How to see six planets in the sky at once in rare celestial alignment

Nearly all of the solar system’s planets are about to file across the night sky in a planetary alignment, and it will be visible from anywhere on Earth

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From images taken by NASA spacecrafts, this picture mosaic was created of six of the planets in our solar system and the Earth's moon. In the foreground is the Earth rising over the lunar surface with the sun flare at the edge of Earth. Venus is the first planet above the moon, and at the top left to right are the planets Jupiter, Mercury, Mars and Saturn. Photo credits are as follows: Earth - Apollo 17; Lunar Surface - Apollo 8; Sun - Apollo 12; Venus - Pioneer Venus; Jupiter - Voyager I; Mercury - Mariner 10; Saturn - Pioneer 11.

Space

What to read this week: Ripples on the Cosmic Ocean by Dagomar Degroot

Culture

Space

Saturn’s rings may have formed after a huge collision with Titan

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Environment

This state’s power prices are plummeting as it nears 100% renewables

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Space

Synchronised volcanic eruptions on Io hint at a spongy interior

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composite picture of Mars

Space

Mars's gravity may help control Earth’s cycle of ice ages

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Physics

Chernobyl cooling systems have lost power but meltdown risk is low

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Our solar system is extremely weird: Best ideas of the century

Space

Our solar system is extremely weird: Best ideas of the century

Features

Space

BepiColombo mission will start to unpick Mercury's secrets in 2026

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This is a false-color composite image of the Fomalhaut System taken with the Hubble telescope's Space Telescope Imaging Spectrograph (STIS) instrument in 2010 and 2012. The black circle at the center of the image blocks out the light from the bright star, allowing reflected light from the belt and planet to be photographed.

Space

Two asteroids crashed around a nearby star, solving a cosmic mystery

A pair of nascent planets have been caught smashing together around the nearby star Fomalhaut, and in doing so have solved the puzzle of its famous ‘planet’

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Space

Comet 3I/ATLAS from beyond solar system carries key molecule for life

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Space

Forming moon may have taken three big impacts early in Earth’s history

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Space

We’ve found an unexpected structure in the solar system’s Kuiper belt

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Environment

Australia is getting free electricity - will other countries follow?

Analysis