Universe Questions and Answers – Page 4

Correct Answer: Option B — Sun. Sun is correct because it is the star at the centre of the Solar System. It is also associated with the photosphere is its visible surface. Together, these two facts identify Sun precisely within Universe. Why the other options are incorrect: Option A — Sirius: Sirius is located in the constellation Canis Major. It is also associated with the brightest star in Earth's night sky, so these facts identify Sirius rather than Sun. Option C — Proxima Centauri: Proxima Centauri is part of the Alpha Centauri stellar system. It is also associated with the nearest known star to the Sun, so these facts identify Proxima Centauri rather than Sun. Option D — Polaris: Polaris is located in Ursa Minor. It is also associated with commonly called the North Star, so these facts identify Polaris rather than Sun. Exam Takeaway: Link Sun with “the star at the centre of the Solar System” and “the photosphere is its visible surface” for quick revision.

Correct Answer: Option A — Sun. Sun is correct because it is a G-type main-sequence star. It is also associated with the star at the centre of the Solar System. Together, these two facts identify Sun precisely within Universe. Why the other options are incorrect: Option B — Sirius: Sirius is a binary star system. It is also associated with located in the constellation Canis Major, so these facts identify Sirius rather than Sun. Option C — Proxima Centauri: Proxima Centauri is a red dwarf star. It is also associated with part of the Alpha Centauri stellar system, so these facts identify Proxima Centauri rather than Sun. Option D — Polaris: Polaris is a Cepheid variable star. It is also associated with located in Ursa Minor, so these facts identify Polaris rather than Sun. Exam Takeaway: Link Sun with “a G-type main-sequence star” and “the star at the centre of the Solar System” for quick revision.

Correct Answer: Option D — Andromeda Galaxy. Andromeda Galaxy is correct because it is it belongs to the Local Group. It is also associated with a spiral galaxy also catalogued as M31. Together, these two facts identify Andromeda Galaxy precisely within Universe. Why the other options are incorrect: Option A — Sun: Sun is sunlight reaches Earth in about 8 minutes 20 seconds. It is also associated with a G-type main-sequence star, so these facts identify Sun rather than Andromeda Galaxy. Option B — Sirius: Sirius is it is about 8.6 light-years from Earth. It is also associated with a binary star system, so these facts identify Sirius rather than Andromeda Galaxy. Option C — Proxima Centauri: Proxima Centauri is it is about 4.24 light-years away. It is also associated with a red dwarf star, so these facts identify Proxima Centauri rather than Andromeda Galaxy. Exam Takeaway: Link Andromeda Galaxy with “it belongs to the Local Group” and “a spiral galaxy also catalogued as M31” for quick revision.

Correct Answer: Option C — Andromeda Galaxy. Andromeda Galaxy is correct because it is it is visible from Earth without a telescope under dark skies. It is also associated with it belongs to the Local Group. Together, these two facts identify Andromeda Galaxy precisely within Universe. Why the other options are incorrect: Option A — Sun: Sun is the photosphere is its visible surface. It is also associated with sunlight reaches Earth in about 8 minutes 20 seconds, so these facts identify Sun rather than Andromeda Galaxy. Option B — Sirius: Sirius is the brightest star in Earth's night sky. It is also associated with it is about 8.6 light-years from Earth, so these facts identify Sirius rather than Andromeda Galaxy. Option D — Proxima Centauri: Proxima Centauri is the nearest known star to the Sun. It is also associated with it is about 4.24 light-years away, so these facts identify Proxima Centauri rather than Andromeda Galaxy. Exam Takeaway: Link Andromeda Galaxy with “it is visible from Earth without a telescope under dark skies” and “it belongs to the Local Group” for quick revision.

Correct Answer: Option B — Andromeda Galaxy. Andromeda Galaxy is correct because it is the nearest large galaxy to the Milky Way. It is also associated with it is visible from Earth without a telescope under dark skies. Together, these two facts identify Andromeda Galaxy precisely within Universe. Why the other options are incorrect: Option A — Sun: Sun is the star at the centre of the Solar System. It is also associated with the photosphere is its visible surface, so these facts identify Sun rather than Andromeda Galaxy. Option C — Sirius: Sirius is located in the constellation Canis Major. It is also associated with the brightest star in Earth's night sky, so these facts identify Sirius rather than Andromeda Galaxy. Option D — Proxima Centauri: Proxima Centauri is part of the Alpha Centauri stellar system. It is also associated with the nearest known star to the Sun, so these facts identify Proxima Centauri rather than Andromeda Galaxy. Exam Takeaway: Link Andromeda Galaxy with “the nearest large galaxy to the Milky Way” and “it is visible from Earth without a telescope under dark skies” for quick revision.

Correct Answer: Option A — Andromeda Galaxy. Andromeda Galaxy is correct because it is a spiral galaxy also catalogued as M31. It is also associated with the nearest large galaxy to the Milky Way. Together, these two facts identify Andromeda Galaxy precisely within Universe. Why the other options are incorrect: Option B — Sun: Sun is a G-type main-sequence star. It is also associated with the star at the centre of the Solar System, so these facts identify Sun rather than Andromeda Galaxy. Option C — Sirius: Sirius is a binary star system. It is also associated with located in the constellation Canis Major, so these facts identify Sirius rather than Andromeda Galaxy. Option D — Proxima Centauri: Proxima Centauri is a red dwarf star. It is also associated with part of the Alpha Centauri stellar system, so these facts identify Proxima Centauri rather than Andromeda Galaxy. Exam Takeaway: Link Andromeda Galaxy with “a spiral galaxy also catalogued as M31” and “the nearest large galaxy to the Milky Way” for quick revision.

Correct Answer: Option D — Milky Way. Milky Way is correct because it is it belongs to the Local Group. It is also associated with a barred spiral galaxy. Together, these two facts identify Milky Way precisely within Universe. Why the other options are incorrect: Option A — Andromeda Galaxy: Andromeda Galaxy is it belongs to the Local Group. It is also associated with a spiral galaxy also catalogued as M31, so these facts identify Andromeda Galaxy rather than Milky Way. Option B — Sun: Sun is sunlight reaches Earth in about 8 minutes 20 seconds. It is also associated with a G-type main-sequence star, so these facts identify Sun rather than Milky Way. Option C — Sirius: Sirius is it is about 8.6 light-years from Earth. It is also associated with a binary star system, so these facts identify Sirius rather than Milky Way. Exam Takeaway: Link Milky Way with “it belongs to the Local Group” and “a barred spiral galaxy” for quick revision.

Correct Answer: Option C — Milky Way. Milky Way is correct because it is Sagittarius A* lies at its centre. It is also associated with it belongs to the Local Group. Together, these two facts identify Milky Way precisely within Universe. Why the other options are incorrect: Option A — Andromeda Galaxy: Andromeda Galaxy is it is visible from Earth without a telescope under dark skies. It is also associated with it belongs to the Local Group, so these facts identify Andromeda Galaxy rather than Milky Way. Option B — Sun: Sun is the photosphere is its visible surface. It is also associated with sunlight reaches Earth in about 8 minutes 20 seconds, so these facts identify Sun rather than Milky Way. Option D — Sirius: Sirius is the brightest star in Earth's night sky. It is also associated with it is about 8.6 light-years from Earth, so these facts identify Sirius rather than Milky Way. Exam Takeaway: Link Milky Way with “Sagittarius A* lies at its centre” and “it belongs to the Local Group” for quick revision.

Correct Answer: Option B — Milky Way. Milky Way is correct because it is the galaxy containing the Solar System. It is also associated with Sagittarius A* lies at its centre. Together, these two facts identify Milky Way precisely within Universe. Why the other options are incorrect: Option A — Andromeda Galaxy: Andromeda Galaxy is the nearest large galaxy to the Milky Way. It is also associated with it is visible from Earth without a telescope under dark skies, so these facts identify Andromeda Galaxy rather than Milky Way. Option C — Sun: Sun is the star at the centre of the Solar System. It is also associated with the photosphere is its visible surface, so these facts identify Sun rather than Milky Way. Option D — Sirius: Sirius is located in the constellation Canis Major. It is also associated with the brightest star in Earth's night sky, so these facts identify Sirius rather than Milky Way. Exam Takeaway: Link Milky Way with “the galaxy containing the Solar System” and “Sagittarius A* lies at its centre” for quick revision.

Correct Answer: Option A — Milky Way. Milky Way is correct because it is a barred spiral galaxy. It is also associated with the galaxy containing the Solar System. Together, these two facts identify Milky Way precisely within Universe. Why the other options are incorrect: Option B — Andromeda Galaxy: Andromeda Galaxy is a spiral galaxy also catalogued as M31. It is also associated with the nearest large galaxy to the Milky Way, so these facts identify Andromeda Galaxy rather than Milky Way. Option C — Sun: Sun is a G-type main-sequence star. It is also associated with the star at the centre of the Solar System, so these facts identify Sun rather than Milky Way. Option D — Sirius: Sirius is a binary star system. It is also associated with located in the constellation Canis Major, so these facts identify Sirius rather than Milky Way. Exam Takeaway: Link Milky Way with “a barred spiral galaxy” and “the galaxy containing the Solar System” for quick revision.