Solar System

35 years after launch, Voyager 1 still in earth's solar system

An artist's image of what Nasa's Voyager 1 might see on its trip.

The Voyager 1 probe was fired into space to observe the outer planets and the mysterious interstellar medium that lies beyond the solar system on September 5, 1977, as Elvis was topping the charts with Way Down.

Sunday, 24 March, 2013, 4:43am

New planet discovered in celestial neighbourhood

An artist's impression of the newly discovered planet, with our sun the bright dot of light in the top right of the picture. Photo: AFP

Astronomers have found a new planet, the closest yet outside our solar system and just an astronomical stone's throw away at four light years, raising the chances of finding a habitable planet in earth's neighbourhood.

18 Oct 2012 - 3:37am

The WOW factor

Naturally gorgeous

15 Jan 2012 - 12:00am


Farther than Pluto

When the faraway icy planet Pluto was discovered in 1930, scientists said our solar system had nine planets. But in January 2005, Mike Brown and his team of scientists at the Palomar Observatory in the United States made a discovery. They saw a large object moving very slowly across the sky.

10 Feb 2010 - 12:00am

Named for the god of war

Mars is the fourth planet from the Sun. It is also known as the Red Planet, because of the colour of its landscape, which even the very earliest astronomers in history could see.

Terror from space

15 Oct 2008 - 12:00am

Comets credited with first waves of life

Comets may have plunged to Earth when it was a hot, rocky, barren and inhospitable place and formed the oceans, David Jewitt told his HKU audience.

16 Dec 2006 - 12:00am

Comet hit makes big impact

How did life arrive on Earth? Nasa scientists are hoping they will soon be able to answer this question after their first successful space collision took place on July 5

Scientists were earlier this month holding their breath as a Nasa space probe headed for a comet 134 million km from Earth. They cheered as they watched the probe slam into the side of the comet.

16 Jul 2005 - 12:00am

Clear skies for lunar eclipse

Skies should be clear for the year's first total lunar eclipse, which begins at 3.50am on Wednesday, the Observatory said.

4 Jan 2001 - 12:00am

Birth signs

Saddam Hussein, Winston Churchill and the Queen have two things in common. They are or were all leaders, and the first-born children in their families.

Tony Blair and John F Kennedy are defined as negotiators and were both middle-born. Mahatma Gandhi and Andy Warhol were last-born, and born to be rebels.

7 Apr 2000 - 12:00am

Ask mr Brain..all will be explained

Why do aircraft have to fly above altitudes of 10,000 metres? Is it not safer to stay at a lower altitude? No, it is actually the opposite. Below 10,000 metres, air currents fall and rise. Thunder and lightning also take place in this layer of the atmosphere.

13 Aug 1999 - 12:00am

Snowballs in space shatter comet myth

People now look forward to sighting a comet but for many centuries comets were believed to have an evil influence on human affairs.

In particular, they were thought to foretell plagues, wars, and death. However, with the development of astronomy, comets are no longer mystical celestial objects.

24 Apr 1997 - 12:00am