21. Which planet appears to be yellowish?
22. Which planet is called the red planet in our solar system?
23. Who discovered that the Earth revolves around the Sun?
USA - United States of America Canada United Kingdom Australia New Zealand South America Brazil Portugal England Scotland Norway Ireland Denmark France Spain Poland Netherland Germany Sweden South Africa Ghana Tanzania Nigeria Kenya Ethiopia Zambia Singapore Malaysia India Pakistan Nepal Taiwan Philippines Libya Cambodia Hong Kong China UAE - Saudi Arabia Qatar Oman Kuwait Bahrain Dubai Israil and many more....