1. Skip to content
  2. Skip to main menu
  3. Skip to more DW sites
Live TV
Latest audioLatest videos
In focus
Russia's war in UkraineIsrael-Hamas warIndia elections

Why don't satellites ever collide?

October 7, 2013

Ponnie Dolo from Wuhan, China

Four Galileo In-Orbit Validation satellites in medium-Earth orbit, the minimum number needed to perform a navigation fix.
Image: ESA – P. Carril
Skip next section Explore more

Explore more

Skip next section DW's Top Story

DW's Top Story

30 years on, South Africa's dream of unity lies shattered

Thirty years after the end of apartheid, South Africa is looking back on a democratic but deeply divided society.
PoliticsApril 27, 2024

South Africa: Winning the fight against apartheid

HistoryApril 25, 202404:41 min

South Africa faces decisive 2024 election

PoliticsMarch 1, 2024
Skip next section More stories from DW

More stories from DW

Africa

Togo's battle for democracy amid constitutional controversy

Togo's battle for democracy amid constitutional controversy

PoliticsApril 27, 2024
More from Africa

Asia

Could Japan allow a woman to be emperor?

Could Japan allow a woman to be emperor?

SocietyApril 26, 2024
More from Asia

Germany

How are foreign doctors faring in Germany?

How are foreign doctors faring in Germany?

SocietyApril 27, 2024
More from Germany

Europe

Spain busts counterfeit ring behind fake euro coins

Spain busts counterfeit ring behind fake euro coins

BusinessApril 27, 2024
More from Europe

Middle East

Tunisia: EU version of 'Rwanda plan' for asylum-seekers?

Tunisia: EU version of 'Rwanda plan' for asylum-seekers?

PoliticsApril 26, 2024
More from Middle East

North America

Which countries have banned TikTok?

Which countries have banned TikTok?

PoliticsApril 26, 2024
More from North America

Latin America

Brazil's Indigenous people blast new ancestral land law

Brazil's Indigenous people blast new ancestral land law

Law and JusticeApril 26, 202403:03 min
More from Latin America
Go to homepage