By Kepler's First Law, every planet orbits the Sun in:
AAn ellipse with the Sun at one focus
BA circle with the Sun at the centre
CA parabola with the Sun at the vertex
DA hyperbola with the Sun at one focus
Answer & Solution
Correct answer: A. An ellipse with the Sun at one focus
Kepler's 1st Law: planet orbits are ELLIPSES with the SUN AT ONE FOCUS (not centre). The other focus is empty. Most planetary orbits have low eccentricity (close to circular, but ELLIPSES, not circles).
Related questions
The Cassegrain telescope design uses the reflective property of a:A satellite dish uses a parabolic reflector because:For a general 2nd-degree equation Ax² + Bxy + Cy² + Dx + Ey + F = 0, the curve is a PARABOThe HYPERBOLA x²/a² − y²/b² = 1 has asymptotes given by:In the standard ellipse x²/a² + y²/b² = 1 (with a > b), the relationship between a, b, c (The standard form of a circle with centre (3, -2) and radius 5 is:The eccentricity of a CIRCLE is:The equation y² = 4ax represents a PARABOLA with: