वह निश्चित पथ क्या कहलाता है जिस पर कोई ग्रह सूर्य के चारों ओर चक्कर लगाता है?

Venus is considered as 'Earth's twin' mainly because of similarities in which features?

The asteroid belt is located between the orbits of which two planets?

Which of the following terrestrial (rocky) planets in the solar system has no natural satellites (moons)?