Impact on Earth?

First broadcast in 1999. How big a threat to Earth are asteroids and comets?

• 13 mins

The Last Total Solar Eclipse of the 20th Century

First broadcast in 1999. How to view and photograph partial and total solar eclipses

• 13 mins

The Weather on Mars

First broadcast in 1999. Mars Climate Orbiter measures the Martian climate and atmosphere

• 14 mins

Martian Dust that Falls to Earth

First broadcast in 1999. The material from Mars that falls to the Earth

• 13 mins

Transit of Mercury

First broadcast in 1999. The importance of a transit of Mercury

• 14 mins

X-ray of the Universe

First broadcast in 1999. Chandra, a telescope to monitor X-rays coming from space

• 13 mins

Millennial Moon

First broadcast in 2000. Total eclipse of the Moon - discussion with Robin Scagell

• 13 mins

Probe at Jupiter

First broadcast in 2000. Latest discoveries from the Galileo mission

• 13 mins

Interview with Astronaut Jeff Hoffman

First broadcast in 2000. The astronaut on the prospect of landing on Mars

• 13 mins

The Aurora

First broadcast in 2000. The Aurora is caused by solar activity

• 13 mins