Tag: science & technology

Perigee specifically refers to the point in an object's orbit where it is closest to Earth. Apogee is the farthest point, while quadrature and conjunction refer to different positional relationships.

Halley's comet has an orbital period of about 75-76 years, making its returns predictable and historically significant. The other options are far too short or long for its actual cycle.

Alexei Leonov performed the first spacewalk on March 18, 1965, during the Voskhod 2 mission. Alan Shepard was the first American in space, while Eileen Collins was the first female shuttle commander.

The Hubble Space Telescope was launched on April 24, 1990, aboard the Space Shuttle Discovery. It has provided unprecedented views of the universe for over 30 years.

Salyut 1, launched by the Soviet Union in 1971, was the world's first space station. Skylab was NASA's first station, while Mir was a later Soviet station, and ISS is the current international station.

Valentina Tereshkova became the first woman in space on June 16, 1963, aboard Vostok 6. Sally Ride was the first American woman in space, while Christa McAuliffe was a teacher who died in the Challenger disaster.

Earth's average distance from the Sun is about 93 million miles, which is defined as one astronomical unit (AU). Mars is farther (~142 million miles), while Mercury and Jupiter are much closer or farther respectively.

The Agni missile was first tested in 1989 at Chandipur-on-sea, located in Odisha (then Orissa). Chandipur is an integrated test range operated by the Defence Research and Development Organisation (DRDO) for missile testing. The other options are not missile test facilities.

Agni I, a nuclear-capable ballistic missile, was successfully test-fired from the Integrated Test Range at Bhadrak, Orissa in October 2007. This test was part of India's strategic missile development program. The other months are incorrect for this specific test launch.